/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:46:26,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:46:26,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:46:26,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:46:26,805 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:46:26,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:46:26,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:46:26,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:46:26,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:46:26,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:46:26,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:46:26,833 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:46:26,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:46:26,834 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:46:26,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:46:26,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:46:26,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:46:26,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:46:26,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:46:26,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:46:26,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:46:26,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:46:26,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:46:26,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:46:26,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:46:26,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:46:26,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:46:26,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:46:26,844 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:46:27,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:46:27,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:46:27,090 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:46:27,091 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:46:27,092 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:46:27,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl [2021-07-13 20:46:27,093 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-array.wvr.bpl' [2021-07-13 20:46:27,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:46:27,122 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:46:27,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:46:27,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:46:27,124 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:46:27,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:46:27,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:46:27,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:46:27,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:46:27,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... [2021-07-13 20:46:27,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:46:27,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:46:27,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:46:27,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:46:27,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:46:27,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:46:27,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:46:27,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:46:27,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:46:27,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:46:27,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:46:27,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:46:27,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:46:27,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:46:27,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:46:27,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:46:27,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:46:27,226 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:46:27,439 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:46:27,439 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:46:27,440 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:46:27 BoogieIcfgContainer [2021-07-13 20:46:27,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:46:27,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:46:27,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:46:27,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:46:27,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:46:27" (1/2) ... [2021-07-13 20:46:27,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26074c33 and model type sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:46:27, skipping insertion in model container [2021-07-13 20:46:27,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:46:27" (2/2) ... [2021-07-13 20:46:27,445 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-array.wvr.bpl [2021-07-13 20:46:27,449 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:46:27,449 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:46:27,449 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:46:27,450 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:46:27,474 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 20:46:27,505 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 20:46:27,518 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:46:27,518 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:46:27,518 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:46:27,518 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:46:27,518 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:46:27,518 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:46:27,518 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:46:27,518 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:46:27,531 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-07-13 20:46:27,552 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 20:46:27,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:27,561 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:27,561 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-07-13 20:46:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435041129] [2021-07-13 20:46:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:27,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435041129] [2021-07-13 20:46:27,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435041129] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:46:27,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:46:27,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:46:27,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842805674] [2021-07-13 20:46:27,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:46:27,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:27,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:46:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:46:27,713 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,774 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-07-13 20:46:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:46:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 20:46:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:27,788 INFO L225 Difference]: With dead ends: 217 [2021-07-13 20:46:27,788 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 20:46:27,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:46:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 20:46:27,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-07-13 20:46:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-07-13 20:46:27,829 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-07-13 20:46:27,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:27,829 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-07-13 20:46:27,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-07-13 20:46:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:46:27,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:27,831 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:27,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:46:27,832 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,833 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-07-13 20:46:27,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788218285] [2021-07-13 20:46:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:27,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788218285] [2021-07-13 20:46:27,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788218285] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:46:27,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:46:27,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:46:27,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531652958] [2021-07-13 20:46:27,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:46:27,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:46:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:46:27,877 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,911 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-07-13 20:46:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:46:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:46:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:27,917 INFO L225 Difference]: With dead ends: 158 [2021-07-13 20:46:27,917 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 20:46:27,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:46:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 20:46:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-07-13 20:46:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-07-13 20:46:27,927 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-07-13 20:46:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:27,927 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-07-13 20:46:27,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-07-13 20:46:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 20:46:27,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:27,928 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:27,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:46:27,929 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:27,929 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-07-13 20:46:27,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:27,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768080262] [2021-07-13 20:46:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:27,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:27,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:27,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768080262] [2021-07-13 20:46:27,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768080262] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:46:27,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:46:27,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:46:27,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810510625] [2021-07-13 20:46:27,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:46:27,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:46:27,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:46:27,963 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:27,999 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-07-13 20:46:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:46:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 20:46:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:28,002 INFO L225 Difference]: With dead ends: 183 [2021-07-13 20:46:28,002 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 20:46:28,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:46:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 20:46:28,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-07-13 20:46:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-07-13 20:46:28,014 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-07-13 20:46:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:28,014 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-07-13 20:46:28,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-07-13 20:46:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:46:28,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:28,015 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:28,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:46:28,015 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-07-13 20:46:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:28,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026807480] [2021-07-13 20:46:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:28,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:28,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026807480] [2021-07-13 20:46:28,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026807480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:28,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282993701] [2021-07-13 20:46:28,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:28,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:46:28,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:46:28,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:28,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:28,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:28,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-07-13 20:46:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:28,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282993701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:28,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:28,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:28,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492038791] [2021-07-13 20:46:28,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:28,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:28,634 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:28,801 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-07-13 20:46:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:46:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:46:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:28,804 INFO L225 Difference]: With dead ends: 330 [2021-07-13 20:46:28,804 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 20:46:28,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 20:46:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-07-13 20:46:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-07-13 20:46:28,816 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-07-13 20:46:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:28,816 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-07-13 20:46:28,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-07-13 20:46:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:46:28,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:28,818 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:29,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:29,019 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-07-13 20:46:29,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070909366] [2021-07-13 20:46:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070909366] [2021-07-13 20:46:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070909366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120943172] [2021-07-13 20:46:29,194 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:29,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:46:29,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:29,373 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:29,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:46:29,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:46:29,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:29,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:29,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:46:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:29,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120943172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:29,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:29,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 20:46:29,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032751301] [2021-07-13 20:46:29,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:29,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:29,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:29,466 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-13 20:46:29,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:29,775 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-07-13 20:46:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:46:29,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-07-13 20:46:29,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:29,778 INFO L225 Difference]: With dead ends: 374 [2021-07-13 20:46:29,778 INFO L226 Difference]: Without dead ends: 359 [2021-07-13 20:46:29,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-07-13 20:46:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-07-13 20:46:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-07-13 20:46:29,786 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-07-13 20:46:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:29,786 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-07-13 20:46:29,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-07-13 20:46:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-07-13 20:46:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:46:29,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:29,787 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:29,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:29,993 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:29,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:29,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-07-13 20:46:29,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:29,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794624297] [2021-07-13 20:46:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:30,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794624297] [2021-07-13 20:46:30,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794624297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:30,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571595895] [2021-07-13 20:46:30,099 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:30,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:46:30,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:30,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 20:46:30,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:30,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 20:46:30,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:30,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:30,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:30,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-13 20:46:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:30,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571595895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:30,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:30,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:46:30,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089534611] [2021-07-13 20:46:30,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:30,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:30,239 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:30,360 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-07-13 20:46:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:46:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 22 [2021-07-13 20:46:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:30,363 INFO L225 Difference]: With dead ends: 363 [2021-07-13 20:46:30,363 INFO L226 Difference]: Without dead ends: 348 [2021-07-13 20:46:30,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:46:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-13 20:46:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-07-13 20:46:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-07-13 20:46:30,374 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-07-13 20:46:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:30,374 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-07-13 20:46:30,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-07-13 20:46:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-13 20:46:30,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:30,375 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:30,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:30,589 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-07-13 20:46:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:30,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370851192] [2021-07-13 20:46:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:30,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370851192] [2021-07-13 20:46:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370851192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401453588] [2021-07-13 20:46:30,693 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:30,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:30,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 20:46:30,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:30,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:30,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-07-13 20:46:30,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:46:30,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:30,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:30,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-07-13 20:46:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401453588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:30,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:30,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:30,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307250337] [2021-07-13 20:46:30,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:30,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:30,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:30,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:30,893 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:31,052 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-07-13 20:46:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 20:46:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-13 20:46:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:31,055 INFO L225 Difference]: With dead ends: 425 [2021-07-13 20:46:31,055 INFO L226 Difference]: Without dead ends: 410 [2021-07-13 20:46:31,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 177.5ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-07-13 20:46:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-07-13 20:46:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-07-13 20:46:31,062 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-07-13 20:46:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,063 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-07-13 20:46:31,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-07-13 20:46:31,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:31,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,064 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:31,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,276 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,276 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-07-13 20:46:31,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176423864] [2021-07-13 20:46:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:31,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176423864] [2021-07-13 20:46:31,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176423864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240747276] [2021-07-13 20:46:31,316 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:31,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:31,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240747276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:31,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:31,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:31,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227134598] [2021-07-13 20:46:31,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:31,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:31,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:31,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:31,442 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:46:31,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:31,769 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-07-13 20:46:31,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:46:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 24 [2021-07-13 20:46:31,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:31,772 INFO L225 Difference]: With dead ends: 619 [2021-07-13 20:46:31,772 INFO L226 Difference]: Without dead ends: 619 [2021-07-13 20:46:31,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:46:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-07-13 20:46:31,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-07-13 20:46:31,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-07-13 20:46:31,780 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-07-13 20:46:31,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:31,780 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-07-13 20:46:31,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:46:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-07-13 20:46:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:31,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:31,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:31,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:46:31,997 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-07-13 20:46:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:31,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582702662] [2021-07-13 20:46:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:32,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:32,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582702662] [2021-07-13 20:46:32,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582702662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:32,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723718397] [2021-07-13 20:46:32,031 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:32,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:32,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:32,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723718397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:32,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:32,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:32,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379502837] [2021-07-13 20:46:32,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:32,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:32,136 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:32,792 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-07-13 20:46:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:32,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:32,797 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 20:46:32,797 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 20:46:32,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:46:32,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 20:46:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-07-13 20:46:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-07-13 20:46:32,808 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-07-13 20:46:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:32,809 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-07-13 20:46:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-07-13 20:46:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:32,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:32,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:33,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:33,028 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-07-13 20:46:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:33,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503418284] [2021-07-13 20:46:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:33,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:33,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503418284] [2021-07-13 20:46:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503418284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512607632] [2021-07-13 20:46:33,077 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:33,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512607632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:33,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:33,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829780139] [2021-07-13 20:46:33,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:33,191 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:33,838 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-07-13 20:46:33,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:46:33,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:33,842 INFO L225 Difference]: With dead ends: 951 [2021-07-13 20:46:33,842 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 20:46:33,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:46:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 20:46:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-07-13 20:46:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-07-13 20:46:33,859 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-07-13 20:46:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:33,859 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-07-13 20:46:33,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-07-13 20:46:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:33,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:33,860 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:34,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:46:34,065 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-07-13 20:46:34,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:34,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192551326] [2021-07-13 20:46:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:34,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:34,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192551326] [2021-07-13 20:46:34,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192551326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741091552] [2021-07-13 20:46:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:46:34,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:34,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741091552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:34,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:46:34,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104096559] [2021-07-13 20:46:34,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:46:34,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:46:34,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:46:34,163 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:34,276 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-07-13 20:46:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:46:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:34,279 INFO L225 Difference]: With dead ends: 669 [2021-07-13 20:46:34,279 INFO L226 Difference]: Without dead ends: 663 [2021-07-13 20:46:34,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-07-13 20:46:34,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-07-13 20:46:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-07-13 20:46:34,289 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-07-13 20:46:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:34,289 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-07-13 20:46:34,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-07-13 20:46:34,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:34,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:34,290 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:34,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:46:34,505 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:34,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:34,505 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-07-13 20:46:34,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:34,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796361917] [2021-07-13 20:46:34,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:34,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796361917] [2021-07-13 20:46:34,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796361917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273147824] [2021-07-13 20:46:34,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:34,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:34,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:34,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:34,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273147824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:34,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:34,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:46:34,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958592233] [2021-07-13 20:46:34,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:34,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:34,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:34,675 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:34,842 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-07-13 20:46:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:46:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:34,845 INFO L225 Difference]: With dead ends: 710 [2021-07-13 20:46:34,845 INFO L226 Difference]: Without dead ends: 672 [2021-07-13 20:46:34,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:46:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-07-13 20:46:34,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-07-13 20:46:34,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-07-13 20:46:34,856 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-07-13 20:46:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:34,856 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-07-13 20:46:34,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:34,856 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-07-13 20:46:34,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:34,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:34,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:35,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:46:35,061 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:35,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:35,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-07-13 20:46:35,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:35,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770877867] [2021-07-13 20:46:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:35,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:35,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770877867] [2021-07-13 20:46:35,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770877867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903455597] [2021-07-13 20:46:35,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:35,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:35,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:35,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:46:35,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:35,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903455597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:35,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:46:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393590920] [2021-07-13 20:46:35,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:46:35,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:46:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:46:35,241 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:35,374 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-07-13 20:46:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:46:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:35,379 INFO L225 Difference]: With dead ends: 830 [2021-07-13 20:46:35,379 INFO L226 Difference]: Without dead ends: 830 [2021-07-13 20:46:35,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-07-13 20:46:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-07-13 20:46:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-07-13 20:46:35,409 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-07-13 20:46:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:35,409 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-07-13 20:46:35,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-07-13 20:46:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:35,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:35,410 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:35,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 20:46:35,627 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:35,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-07-13 20:46:35,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:35,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196652110] [2021-07-13 20:46:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:35,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:35,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196652110] [2021-07-13 20:46:35,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196652110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536972750] [2021-07-13 20:46:35,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:35,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:35,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:35,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:35,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536972750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:35,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:35,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:35,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904652367] [2021-07-13 20:46:35,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:35,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:35,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:35,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:35,835 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:36,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:36,197 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-07-13 20:46:36,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:46:36,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:36,202 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 20:46:36,202 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 20:46:36,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:36,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 20:46:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-07-13 20:46:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-07-13 20:46:36,258 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-07-13 20:46:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:36,258 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-07-13 20:46:36,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:36,259 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-07-13 20:46:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:36,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:36,260 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:36,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:46:36,476 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-07-13 20:46:36,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:36,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050278086] [2021-07-13 20:46:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050278086] [2021-07-13 20:46:36,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050278086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612505824] [2021-07-13 20:46:36,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:36,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:36,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:36,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:36,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612505824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:36,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:36,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:36,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689010622] [2021-07-13 20:46:36,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:36,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:36,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:36,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:36,650 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:37,158 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-07-13 20:46:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:46:37,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:37,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:37,164 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 20:46:37,164 INFO L226 Difference]: Without dead ends: 1492 [2021-07-13 20:46:37,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:46:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-07-13 20:46:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-07-13 20:46:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-07-13 20:46:37,215 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-07-13 20:46:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:37,215 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-07-13 20:46:37,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-07-13 20:46:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:37,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:37,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:37,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:37,433 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-07-13 20:46:37,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:37,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087913773] [2021-07-13 20:46:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:37,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:37,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087913773] [2021-07-13 20:46:37,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087913773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:37,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118708483] [2021-07-13 20:46:37,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:37,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:37,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:37,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:37,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118708483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:37,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:37,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:46:37,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140942556] [2021-07-13 20:46:37,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:37,576 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:37,801 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-07-13 20:46:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:46:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:37,806 INFO L225 Difference]: With dead ends: 1258 [2021-07-13 20:46:37,806 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 20:46:37,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 20:46:37,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-07-13 20:46:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-07-13 20:46:37,834 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-07-13 20:46:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:37,834 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-07-13 20:46:37,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-07-13 20:46:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:37,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:37,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:38,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-07-13 20:46:38,061 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-07-13 20:46:38,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:38,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857954005] [2021-07-13 20:46:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:38,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857954005] [2021-07-13 20:46:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857954005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959792294] [2021-07-13 20:46:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:38,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:38,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959792294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:38,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:38,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 20:46:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887692900] [2021-07-13 20:46:38,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:38,193 INFO L87 Difference]: Start difference. First operand 758 states and 2441 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) [2021-07-13 20:46:38,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:38,476 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-07-13 20:46:38,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:46:38,476 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 24 [2021-07-13 20:46:38,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:38,481 INFO L225 Difference]: With dead ends: 1329 [2021-07-13 20:46:38,481 INFO L226 Difference]: Without dead ends: 1329 [2021-07-13 20:46:38,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-07-13 20:46:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-07-13 20:46:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 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) [2021-07-13 20:46:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-07-13 20:46:38,497 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-07-13 20:46:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:38,497 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-07-13 20:46:38,497 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) [2021-07-13 20:46:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-07-13 20:46:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:38,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:38,499 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:38,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:38,713 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:38,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-07-13 20:46:38,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:38,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134149931] [2021-07-13 20:46:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:38,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:38,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:38,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134149931] [2021-07-13 20:46:38,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134149931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:38,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252028887] [2021-07-13 20:46:38,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:38,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:38,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:38,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:38,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252028887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:38,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:38,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:38,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212700678] [2021-07-13 20:46:38,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:38,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:38,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:38,815 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:39,141 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-07-13 20:46:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:46:39,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:39,150 INFO L225 Difference]: With dead ends: 1548 [2021-07-13 20:46:39,150 INFO L226 Difference]: Without dead ends: 1544 [2021-07-13 20:46:39,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:46:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-07-13 20:46:39,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-07-13 20:46:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-07-13 20:46:39,167 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-07-13 20:46:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:39,167 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-07-13 20:46:39,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-07-13 20:46:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:39,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:39,169 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:39,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 20:46:39,375 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:39,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-07-13 20:46:39,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:39,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020838608] [2021-07-13 20:46:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:39,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020838608] [2021-07-13 20:46:39,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020838608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516651741] [2021-07-13 20:46:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:39,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:39,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:39,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:39,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516651741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:39,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:39,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:39,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68555338] [2021-07-13 20:46:39,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:39,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:39,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:39,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:39,562 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:40,246 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-07-13 20:46:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:46:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:40,257 INFO L225 Difference]: With dead ends: 2734 [2021-07-13 20:46:40,257 INFO L226 Difference]: Without dead ends: 2734 [2021-07-13 20:46:40,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:46:40,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-07-13 20:46:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-07-13 20:46:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-07-13 20:46:40,284 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-07-13 20:46:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-07-13 20:46:40,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-07-13 20:46:40,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:40,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:40,286 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:40,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,493 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-07-13 20:46:40,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:40,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367280929] [2021-07-13 20:46:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:40,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367280929] [2021-07-13 20:46:40,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367280929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585686674] [2021-07-13 20:46:40,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:40,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:40,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:40,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:40,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585686674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:40,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:40,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:40,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731771789] [2021-07-13 20:46:40,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:40,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:40,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:40,643 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:41,290 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-07-13 20:46:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:46:41,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:41,297 INFO L225 Difference]: With dead ends: 2693 [2021-07-13 20:46:41,297 INFO L226 Difference]: Without dead ends: 2693 [2021-07-13 20:46:41,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:46:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-07-13 20:46:41,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-07-13 20:46:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-07-13 20:46:41,323 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-07-13 20:46:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:41,323 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-07-13 20:46:41,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-07-13 20:46:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:41,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:41,325 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:41,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 20:46:41,542 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:41,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:41,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-07-13 20:46:41,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:41,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687357962] [2021-07-13 20:46:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:41,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687357962] [2021-07-13 20:46:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687357962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:41,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535237102] [2021-07-13 20:46:41,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:41,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:41,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:41,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:41,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:41,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535237102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:41,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:41,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:41,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617797284] [2021-07-13 20:46:41,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:41,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:41,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:41,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:41,670 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:42,241 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-07-13 20:46:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:46:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:42,248 INFO L225 Difference]: With dead ends: 2677 [2021-07-13 20:46:42,248 INFO L226 Difference]: Without dead ends: 2677 [2021-07-13 20:46:42,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:46:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-07-13 20:46:42,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-07-13 20:46:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 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) [2021-07-13 20:46:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-07-13 20:46:42,274 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-07-13 20:46:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:42,274 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-07-13 20:46:42,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-07-13 20:46:42,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:42,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:42,276 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:42,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:46:42,493 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-07-13 20:46:42,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:42,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849799741] [2021-07-13 20:46:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:42,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849799741] [2021-07-13 20:46:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849799741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197445718] [2021-07-13 20:46:42,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:42,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:46:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:42,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:42,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:42,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197445718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:42,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:42,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:42,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027965927] [2021-07-13 20:46:42,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:42,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:42,629 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:43,146 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-07-13 20:46:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:46:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:43,152 INFO L225 Difference]: With dead ends: 2474 [2021-07-13 20:46:43,152 INFO L226 Difference]: Without dead ends: 2470 [2021-07-13 20:46:43,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:46:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-07-13 20:46:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-07-13 20:46:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-07-13 20:46:43,176 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-07-13 20:46:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:43,177 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-07-13 20:46:43,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-07-13 20:46:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:43,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:43,178 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:43,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:46:43,393 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:43,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:43,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-07-13 20:46:43,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:43,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737595252] [2021-07-13 20:46:43,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:43,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:43,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737595252] [2021-07-13 20:46:43,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737595252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794120751] [2021-07-13 20:46:43,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:43,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:46:43,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:43,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:43,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794120751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:43,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:43,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20894211] [2021-07-13 20:46:43,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:43,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:43,549 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:44,146 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-07-13 20:46:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:46:44,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:44,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:44,157 INFO L225 Difference]: With dead ends: 2514 [2021-07-13 20:46:44,158 INFO L226 Difference]: Without dead ends: 2514 [2021-07-13 20:46:44,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:46:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-07-13 20:46:44,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-07-13 20:46:44,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-07-13 20:46:44,184 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-07-13 20:46:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:44,184 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-07-13 20:46:44,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-07-13 20:46:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:44,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:44,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:44,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:46:44,405 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-07-13 20:46:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019723443] [2021-07-13 20:46:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:44,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:44,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019723443] [2021-07-13 20:46:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019723443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:44,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999057383] [2021-07-13 20:46:44,434 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:44,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999057383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:44,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:44,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:44,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539178526] [2021-07-13 20:46:44,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:44,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:44,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:44,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:44,529 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:45,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:45,106 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-07-13 20:46:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:46:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:45,112 INFO L225 Difference]: With dead ends: 2332 [2021-07-13 20:46:45,112 INFO L226 Difference]: Without dead ends: 2328 [2021-07-13 20:46:45,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:46:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-07-13 20:46:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-07-13 20:46:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 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) [2021-07-13 20:46:45,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-07-13 20:46:45,135 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-07-13 20:46:45,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:45,135 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-07-13 20:46:45,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:45,135 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-07-13 20:46:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:45,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:45,137 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:45,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:46:45,353 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-07-13 20:46:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212054346] [2021-07-13 20:46:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:45,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212054346] [2021-07-13 20:46:45,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212054346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272060637] [2021-07-13 20:46:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:45,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 20:46:45,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:46:45,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:45,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272060637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:45,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 20:46:45,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621498427] [2021-07-13 20:46:45,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 20:46:45,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:45,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 20:46:45,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:46:45,446 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:45,522 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-07-13 20:46:45,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:46:45,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:45,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:45,525 INFO L225 Difference]: With dead ends: 929 [2021-07-13 20:46:45,525 INFO L226 Difference]: Without dead ends: 929 [2021-07-13 20:46:45,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:45,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-07-13 20:46:45,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-07-13 20:46:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-07-13 20:46:45,536 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-07-13 20:46:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:45,536 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-07-13 20:46:45,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-07-13 20:46:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:45,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:45,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:45,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:45,753 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-07-13 20:46:45,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:45,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769967576] [2021-07-13 20:46:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:45,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769967576] [2021-07-13 20:46:45,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769967576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27497802] [2021-07-13 20:46:45,783 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:45,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:45,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:45,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:45,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27497802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:45,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:45,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:46:45,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607252541] [2021-07-13 20:46:45,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:46:45,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:45,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:46:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:46:45,865 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:46,187 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-07-13 20:46:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:46:46,187 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-07-13 20:46:46,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:46,190 INFO L225 Difference]: With dead ends: 1555 [2021-07-13 20:46:46,190 INFO L226 Difference]: Without dead ends: 1555 [2021-07-13 20:46:46,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:46:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-07-13 20:46:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-07-13 20:46:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-07-13 20:46:46,207 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-07-13 20:46:46,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:46,207 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-07-13 20:46:46,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-07-13 20:46:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:46,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:46,208 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:46,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:46,425 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-07-13 20:46:46,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:46,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686498994] [2021-07-13 20:46:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:46,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686498994] [2021-07-13 20:46:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686498994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139412484] [2021-07-13 20:46:46,451 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:46,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:46,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:46,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:46,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139412484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:46,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:46,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:46:46,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699346806] [2021-07-13 20:46:46,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:46:46,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:46:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:46:46,520 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:46,742 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-07-13 20:46:46,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:46:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-07-13 20:46:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:46,746 INFO L225 Difference]: With dead ends: 1605 [2021-07-13 20:46:46,746 INFO L226 Difference]: Without dead ends: 1605 [2021-07-13 20:46:46,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:46:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-07-13 20:46:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-07-13 20:46:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 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) [2021-07-13 20:46:46,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-07-13 20:46:46,762 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-07-13 20:46:46,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:46,762 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-07-13 20:46:46,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-07-13 20:46:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:46,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:46,764 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:46,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:46,981 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-07-13 20:46:46,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:46,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426276133] [2021-07-13 20:46:46,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:47,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426276133] [2021-07-13 20:46:47,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426276133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890009547] [2021-07-13 20:46:47,008 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:47,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:46:47,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890009547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:47,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 20:46:47,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747748128] [2021-07-13 20:46:47,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:46:47,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:47,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:46:47,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:46:47,074 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:47,246 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-07-13 20:46:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:46:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-07-13 20:46:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:47,249 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:46:47,249 INFO L226 Difference]: Without dead ends: 1520 [2021-07-13 20:46:47,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:46:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-07-13 20:46:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-07-13 20:46:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-07-13 20:46:47,264 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-07-13 20:46:47,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:47,264 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-07-13 20:46:47,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-07-13 20:46:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:47,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:47,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:47,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-13 20:46:47,466 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-07-13 20:46:47,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:47,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340745792] [2021-07-13 20:46:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:47,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340745792] [2021-07-13 20:46:47,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340745792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825982811] [2021-07-13 20:46:47,494 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:47,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:47,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:47,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:47,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:47,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825982811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:47,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:47,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:46:47,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145882487] [2021-07-13 20:46:47,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:46:47,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:47,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:46:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:46:47,559 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:47,746 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-07-13 20:46:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:46:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-07-13 20:46:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:47,749 INFO L225 Difference]: With dead ends: 1508 [2021-07-13 20:46:47,749 INFO L226 Difference]: Without dead ends: 1496 [2021-07-13 20:46:47,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:46:47,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-07-13 20:46:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-07-13 20:46:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-07-13 20:46:47,765 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-07-13 20:46:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:47,765 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-07-13 20:46:47,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-07-13 20:46:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:47,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:47,766 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:47,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:47,971 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:47,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-07-13 20:46:47,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:47,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887190715] [2021-07-13 20:46:47,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:48,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:48,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887190715] [2021-07-13 20:46:48,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887190715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612228390] [2021-07-13 20:46:48,004 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:48,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:48,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:48,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:48,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612228390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:48,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:48,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480769240] [2021-07-13 20:46:48,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:48,129 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:48,612 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-07-13 20:46:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:46:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:48,616 INFO L225 Difference]: With dead ends: 2412 [2021-07-13 20:46:48,616 INFO L226 Difference]: Without dead ends: 2412 [2021-07-13 20:46:48,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:46:48,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-07-13 20:46:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-07-13 20:46:48,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-07-13 20:46:48,637 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-07-13 20:46:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:48,637 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-07-13 20:46:48,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-07-13 20:46:48,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:48,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:48,639 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:48,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-13 20:46:48,843 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:48,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-07-13 20:46:48,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:48,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479165726] [2021-07-13 20:46:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:48,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479165726] [2021-07-13 20:46:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479165726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868931952] [2021-07-13 20:46:48,881 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:48,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:48,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868931952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:48,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:48,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:48,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199550025] [2021-07-13 20:46:48,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:48,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:48,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:48,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:48,986 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:49,405 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-07-13 20:46:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:46:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:49,409 INFO L225 Difference]: With dead ends: 2335 [2021-07-13 20:46:49,409 INFO L226 Difference]: Without dead ends: 2335 [2021-07-13 20:46:49,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 266.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:46:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-07-13 20:46:49,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-07-13 20:46:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 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) [2021-07-13 20:46:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:46:49,431 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:46:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:49,431 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:46:49,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:46:49,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:49,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:49,433 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:49,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:49,649 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-07-13 20:46:49,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:49,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855223250] [2021-07-13 20:46:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:49,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855223250] [2021-07-13 20:46:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855223250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728671072] [2021-07-13 20:46:49,683 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:49,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:49,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:49,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:49,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728671072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:49,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:49,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:49,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821990232] [2021-07-13 20:46:49,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:49,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:49,771 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:50,143 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-07-13 20:46:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:46:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:50,148 INFO L225 Difference]: With dead ends: 2285 [2021-07-13 20:46:50,148 INFO L226 Difference]: Without dead ends: 2285 [2021-07-13 20:46:50,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:46:50,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-07-13 20:46:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-07-13 20:46:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 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) [2021-07-13 20:46:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:46:50,169 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:46:50,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:50,169 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:46:50,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,169 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:46:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:50,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:50,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:50,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 20:46:50,371 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:50,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-07-13 20:46:50,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:50,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368848538] [2021-07-13 20:46:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:50,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368848538] [2021-07-13 20:46:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368848538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032963886] [2021-07-13 20:46:50,401 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:50,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:50,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032963886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:50,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:50,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:50,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36602767] [2021-07-13 20:46:50,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:50,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:50,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:50,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:50,485 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:50,812 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-07-13 20:46:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:46:50,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:50,816 INFO L225 Difference]: With dead ends: 2176 [2021-07-13 20:46:50,816 INFO L226 Difference]: Without dead ends: 2172 [2021-07-13 20:46:50,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:46:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-07-13 20:46:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-07-13 20:46:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 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) [2021-07-13 20:46:50,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:46:50,835 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:46:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:50,835 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:46:50,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:46:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:50,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:50,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:51,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:51,037 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-07-13 20:46:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:51,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676605963] [2021-07-13 20:46:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:51,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676605963] [2021-07-13 20:46:51,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676605963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907222490] [2021-07-13 20:46:51,067 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:51,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:51,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:51,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907222490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:51,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:51,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825762731] [2021-07-13 20:46:51,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:51,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:51,158 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:51,479 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-07-13 20:46:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:46:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:51,490 INFO L225 Difference]: With dead ends: 2199 [2021-07-13 20:46:51,490 INFO L226 Difference]: Without dead ends: 2199 [2021-07-13 20:46:51,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-07-13 20:46:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-07-13 20:46:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 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) [2021-07-13 20:46:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-07-13 20:46:51,510 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-07-13 20:46:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:51,510 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-07-13 20:46:51,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-07-13 20:46:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:51,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:51,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:51,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 20:46:51,714 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:51,714 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-07-13 20:46:51,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:51,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971157484] [2021-07-13 20:46:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971157484] [2021-07-13 20:46:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971157484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476311282] [2021-07-13 20:46:51,754 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:51,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476311282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:51,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:51,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:51,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187058394] [2021-07-13 20:46:51,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:51,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:51,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:51,843 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:52,169 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-07-13 20:46:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:46:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:52,173 INFO L225 Difference]: With dead ends: 2156 [2021-07-13 20:46:52,173 INFO L226 Difference]: Without dead ends: 2152 [2021-07-13 20:46:52,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:46:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-07-13 20:46:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-07-13 20:46:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 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) [2021-07-13 20:46:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-07-13 20:46:52,192 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-07-13 20:46:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:52,193 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-07-13 20:46:52,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-07-13 20:46:52,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:52,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:52,194 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:52,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 20:46:52,409 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:52,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:52,409 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-07-13 20:46:52,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:52,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534535765] [2021-07-13 20:46:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:52,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:52,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534535765] [2021-07-13 20:46:52,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534535765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43669118] [2021-07-13 20:46:52,440 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:52,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:52,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:52,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43669118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:52,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:52,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:52,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749999424] [2021-07-13 20:46:52,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:52,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:52,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:52,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:52,522 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:52,869 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-07-13 20:46:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:46:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:52,872 INFO L225 Difference]: With dead ends: 2097 [2021-07-13 20:46:52,872 INFO L226 Difference]: Without dead ends: 2097 [2021-07-13 20:46:52,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:46:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-07-13 20:46:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-07-13 20:46:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-07-13 20:46:52,892 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-07-13 20:46:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:52,892 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-07-13 20:46:52,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-07-13 20:46:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:52,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:52,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:53,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 20:46:53,098 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:53,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-07-13 20:46:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140278289] [2021-07-13 20:46:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:53,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:53,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140278289] [2021-07-13 20:46:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140278289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541718072] [2021-07-13 20:46:53,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:53,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:53,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:53,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541718072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:53,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:53,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296779906] [2021-07-13 20:46:53,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:53,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:53,201 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:53,453 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-07-13 20:46:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:46:53,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:53,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:53,456 INFO L225 Difference]: With dead ends: 1963 [2021-07-13 20:46:53,456 INFO L226 Difference]: Without dead ends: 1959 [2021-07-13 20:46:53,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:46:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-07-13 20:46:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-07-13 20:46:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-07-13 20:46:53,484 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-07-13 20:46:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:53,484 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-07-13 20:46:53,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-07-13 20:46:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:53,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:53,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:53,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 20:46:53,701 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:53,701 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-07-13 20:46:53,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:53,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743396741] [2021-07-13 20:46:53,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:53,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:53,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743396741] [2021-07-13 20:46:53,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743396741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455843527] [2021-07-13 20:46:53,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:46:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:53,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455843527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:53,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:53,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:46:53,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434931584] [2021-07-13 20:46:53,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:46:53,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:53,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:46:53,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:46:53,811 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:53,991 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-07-13 20:46:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:46:53,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:53,994 INFO L225 Difference]: With dead ends: 1728 [2021-07-13 20:46:53,994 INFO L226 Difference]: Without dead ends: 1716 [2021-07-13 20:46:53,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:46:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-07-13 20:46:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-07-13 20:46:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-07-13 20:46:54,013 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-07-13 20:46:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:54,013 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-07-13 20:46:54,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-07-13 20:46:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:54,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:54,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:54,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:54,217 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:54,217 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-07-13 20:46:54,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:54,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755788256] [2021-07-13 20:46:54,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:54,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:54,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755788256] [2021-07-13 20:46:54,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755788256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061650772] [2021-07-13 20:46:54,251 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:54,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:46:54,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:54,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061650772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:54,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500571361] [2021-07-13 20:46:54,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:54,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:54,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:54,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:54,341 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:54,615 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-07-13 20:46:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:46:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:54,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:54,618 INFO L225 Difference]: With dead ends: 1821 [2021-07-13 20:46:54,618 INFO L226 Difference]: Without dead ends: 1821 [2021-07-13 20:46:54,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:46:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-13 20:46:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-07-13 20:46:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-07-13 20:46:54,637 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-07-13 20:46:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:54,637 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-07-13 20:46:54,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-07-13 20:46:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:54,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:54,639 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:54,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:46:54,857 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-07-13 20:46:54,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:54,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461201472] [2021-07-13 20:46:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:54,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:54,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461201472] [2021-07-13 20:46:54,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461201472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509012791] [2021-07-13 20:46:54,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:54,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:54,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:54,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:54,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:54,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509012791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:54,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:54,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 20:46:54,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149744573] [2021-07-13 20:46:54,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:46:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:54,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:46:54,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:46:54,972 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:55,210 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-07-13 20:46:55,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:46:55,210 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-07-13 20:46:55,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:55,214 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:46:55,214 INFO L226 Difference]: Without dead ends: 1786 [2021-07-13 20:46:55,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-07-13 20:46:55,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-07-13 20:46:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-07-13 20:46:55,233 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-07-13 20:46:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:55,233 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-07-13 20:46:55,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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) [2021-07-13 20:46:55,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-07-13 20:46:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:46:55,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:55,235 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:55,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 20:46:55,435 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:55,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-07-13 20:46:55,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:55,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351467987] [2021-07-13 20:46:55,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:55,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351467987] [2021-07-13 20:46:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351467987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771282095] [2021-07-13 20:46:55,471 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:55,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:55,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:55,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:46:55,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:55,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:55,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771282095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:55,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:55,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 20:46:55,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730762518] [2021-07-13 20:46:55,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:46:55,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:46:55,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:46:55,566 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:55,737 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-07-13 20:46:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:46:55,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:46:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:55,740 INFO L225 Difference]: With dead ends: 1649 [2021-07-13 20:46:55,740 INFO L226 Difference]: Without dead ends: 1637 [2021-07-13 20:46:55,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-07-13 20:46:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-07-13 20:46:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-07-13 20:46:55,757 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-07-13 20:46:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:55,757 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-07-13 20:46:55,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-07-13 20:46:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:46:55,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:55,759 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:55,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:55,975 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:55,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-07-13 20:46:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:55,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558453662] [2021-07-13 20:46:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:56,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:56,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558453662] [2021-07-13 20:46:56,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558453662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899431536] [2021-07-13 20:46:56,181 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:56,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:46:56,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:56,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:46:56,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:56,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:56,375 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 19 treesize of output 11 [2021-07-13 20:46:56,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:56,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:56,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:46:56,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:56,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899431536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:56,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:56,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:46:56,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049343127] [2021-07-13 20:46:56,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:46:56,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:46:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:46:56,398 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:56,827 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-07-13 20:46:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:46:56,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:46:56,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:56,830 INFO L225 Difference]: With dead ends: 1517 [2021-07-13 20:46:56,830 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 20:46:56,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:46:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 20:46:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-07-13 20:46:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-07-13 20:46:56,846 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-07-13 20:46:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:56,846 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-07-13 20:46:56,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-07-13 20:46:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:46:56,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:56,848 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:57,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 20:46:57,048 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-07-13 20:46:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:57,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603076613] [2021-07-13 20:46:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:57,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:57,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603076613] [2021-07-13 20:46:57,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603076613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:57,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681448577] [2021-07-13 20:46:57,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:57,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:46:57,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:46:57,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:57,446 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 19 treesize of output 11 [2021-07-13 20:46:57,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:57,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:57,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:46:57,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:57,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681448577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:57,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:57,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:46:57,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753061664] [2021-07-13 20:46:57,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:46:57,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:57,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:46:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:46:57,468 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:58,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:46:58,200 INFO L93 Difference]: Finished difference Result 1498 states and 4907 transitions. [2021-07-13 20:46:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:46:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:46:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:46:58,203 INFO L225 Difference]: With dead ends: 1498 [2021-07-13 20:46:58,203 INFO L226 Difference]: Without dead ends: 1483 [2021-07-13 20:46:58,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:46:58,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-07-13 20:46:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1150. [2021-07-13 20:46:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:58,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-07-13 20:46:58,229 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-07-13 20:46:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:46:58,229 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-07-13 20:46:58,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:46:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-07-13 20:46:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:46:58,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:46:58,231 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:46:58,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:58,432 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:46:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:46:58,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-07-13 20:46:58,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:46:58,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115035918] [2021-07-13 20:46:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:46:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:46:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:58,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:46:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115035918] [2021-07-13 20:46:58,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115035918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990185918] [2021-07-13 20:46:58,733 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:46:58,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:46:58,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:46:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:46:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:46:58,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:46:58,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:58,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:46:58,914 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 21 treesize of output 11 [2021-07-13 20:46:58,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:46:58,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:46:58,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:46:58,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:46:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:46:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990185918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:46:58,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:46:58,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:46:58,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818542190] [2021-07-13 20:46:58,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:46:58,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:46:58,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:46:58,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:46:58,937 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:00,816 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-07-13 20:47:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:47:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:00,819 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 20:47:00,819 INFO L226 Difference]: Without dead ends: 1635 [2021-07-13 20:47:00,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1738.2ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:47:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-07-13 20:47:00,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-07-13 20:47:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-07-13 20:47:00,842 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-07-13 20:47:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:00,842 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-07-13 20:47:00,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-07-13 20:47:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:00,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:00,844 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:01,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 20:47:01,045 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-07-13 20:47:01,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:01,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799170079] [2021-07-13 20:47:01,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:01,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:01,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799170079] [2021-07-13 20:47:01,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799170079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:01,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152586338] [2021-07-13 20:47:01,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:01,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:01,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:01,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:01,364 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 19 treesize of output 19 [2021-07-13 20:47:01,368 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:01,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:01,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:01,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:47:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:01,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152586338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:01,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:01,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:47:01,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766070969] [2021-07-13 20:47:01,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:01,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:01,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:01,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:01,414 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:02,807 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-07-13 20:47:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:47:02,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:02,810 INFO L225 Difference]: With dead ends: 1879 [2021-07-13 20:47:02,810 INFO L226 Difference]: Without dead ends: 1864 [2021-07-13 20:47:02,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1089.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:47:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-07-13 20:47:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-07-13 20:47:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-07-13 20:47:02,830 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-07-13 20:47:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:02,830 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-07-13 20:47:02,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-07-13 20:47:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:02,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:02,832 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:03,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 20:47:03,032 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:03,033 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-07-13 20:47:03,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:03,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204954943] [2021-07-13 20:47:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:03,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204954943] [2021-07-13 20:47:03,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204954943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:03,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757206935] [2021-07-13 20:47:03,292 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:47:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:03,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:03,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:03,464 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 21 treesize of output 11 [2021-07-13 20:47:03,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:03,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:03,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:03,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757206935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:03,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:03,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:47:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152710719] [2021-07-13 20:47:03,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:03,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:03,492 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:05,399 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-07-13 20:47:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:05,828 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-07-13 20:47:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:47:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:05,832 INFO L225 Difference]: With dead ends: 1869 [2021-07-13 20:47:05,832 INFO L226 Difference]: Without dead ends: 1854 [2021-07-13 20:47:05,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2082.4ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:47:05,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-07-13 20:47:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-07-13 20:47:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-07-13 20:47:05,851 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-07-13 20:47:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:05,851 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-07-13 20:47:05,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-07-13 20:47:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:05,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:05,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:06,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:06,054 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:06,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:06,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-07-13 20:47:06,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:06,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621231098] [2021-07-13 20:47:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:06,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621231098] [2021-07-13 20:47:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621231098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472738030] [2021-07-13 20:47:06,259 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:06,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:06,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:06,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:06,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 59 [2021-07-13 20:47:06,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:06,908 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-13 20:47:06,908 INFO L628 ElimStorePlain]: treesize reduction 131, result has 54.2 percent of original size [2021-07-13 20:47:07,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:07,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:692 [2021-07-13 20:47:07,422 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-13 20:47:07,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472738030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:07,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:07,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:47:07,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351643600] [2021-07-13 20:47:07,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:47:07,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:07,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:47:07,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:47:07,617 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 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) [2021-07-13 20:47:09,139 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2021-07-13 20:47:09,699 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 20:47:09,923 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-13 20:47:10,084 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-07-13 20:47:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:10,127 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-07-13 20:47:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:47:10,127 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 26 [2021-07-13 20:47:10,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:10,131 INFO L225 Difference]: With dead ends: 2129 [2021-07-13 20:47:10,131 INFO L226 Difference]: Without dead ends: 2114 [2021-07-13 20:47:10,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2564.2ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:47:10,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-07-13 20:47:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-07-13 20:47:10,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-07-13 20:47:10,151 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-07-13 20:47:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:10,151 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-07-13 20:47:10,151 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) [2021-07-13 20:47:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-07-13 20:47:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:10,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:10,153 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:10,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 20:47:10,353 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:10,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:10,354 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-07-13 20:47:10,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:10,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196191428] [2021-07-13 20:47:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:10,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:10,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196191428] [2021-07-13 20:47:10,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196191428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917719618] [2021-07-13 20:47:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:10,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:10,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:10,709 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 19 treesize of output 11 [2021-07-13 20:47:10,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:10,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:10,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:10,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:10,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917719618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:10,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:10,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:10,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74545600] [2021-07-13 20:47:10,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:10,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:10,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:10,731 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:11,338 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-07-13 20:47:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:47:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:11,341 INFO L225 Difference]: With dead ends: 1622 [2021-07-13 20:47:11,341 INFO L226 Difference]: Without dead ends: 1607 [2021-07-13 20:47:11,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:47:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-07-13 20:47:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-07-13 20:47:11,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-07-13 20:47:11,359 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-07-13 20:47:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:11,360 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-07-13 20:47:11,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-07-13 20:47:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:11,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:11,362 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:11,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:11,577 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-07-13 20:47:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:11,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069261387] [2021-07-13 20:47:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:11,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069261387] [2021-07-13 20:47:11,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069261387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:11,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155904798] [2021-07-13 20:47:11,757 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) [2021-07-13 20:47:11,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:11,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:11,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:11,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:11,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:11,969 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 [2021-07-13 20:47:11,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:11,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:12,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:12,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:117 [2021-07-13 20:47:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:12,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155904798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:12,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:12,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:12,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444092469] [2021-07-13 20:47:12,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:12,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:12,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:12,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:12,139 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:13,987 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-07-13 20:47:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:47:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-07-13 20:47:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:13,991 INFO L225 Difference]: With dead ends: 1952 [2021-07-13 20:47:13,991 INFO L226 Difference]: Without dead ends: 1937 [2021-07-13 20:47:13,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1661.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:47:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-07-13 20:47:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-07-13 20:47:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-07-13 20:47:14,011 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-07-13 20:47:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:14,011 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-07-13 20:47:14,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-07-13 20:47:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:14,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:14,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 20:47:14,224 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-07-13 20:47:14,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:14,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051693570] [2021-07-13 20:47:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:14,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:14,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051693570] [2021-07-13 20:47:14,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051693570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:14,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892458539] [2021-07-13 20:47:14,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:14,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:14,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:14,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:14,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:14,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:14,608 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 19 treesize of output 11 [2021-07-13 20:47:14,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:14,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:14,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:14,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-07-13 20:47:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:14,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892458539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:14,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:14,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:14,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763198606] [2021-07-13 20:47:14,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:14,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:14,627 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:15,445 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-07-13 20:47:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:47:15,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:15,449 INFO L225 Difference]: With dead ends: 1876 [2021-07-13 20:47:15,449 INFO L226 Difference]: Without dead ends: 1861 [2021-07-13 20:47:15,449 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:47:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-07-13 20:47:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-07-13 20:47:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:15,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-07-13 20:47:15,468 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-07-13 20:47:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:15,468 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-07-13 20:47:15,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-07-13 20:47:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:15,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:15,470 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:15,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:15,671 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:15,671 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-07-13 20:47:15,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:15,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543269655] [2021-07-13 20:47:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:15,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543269655] [2021-07-13 20:47:15,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543269655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:15,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893093189] [2021-07-13 20:47:15,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:15,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:15,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:15,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:15,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:16,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:16,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:16,019 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 19 treesize of output 11 [2021-07-13 20:47:16,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:16,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:16,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:16,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:16,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893093189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:16,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:16,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:47:16,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953076170] [2021-07-13 20:47:16,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:16,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:16,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:16,046 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:17,330 INFO L93 Difference]: Finished difference Result 2069 states and 6711 transitions. [2021-07-13 20:47:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:47:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:17,334 INFO L225 Difference]: With dead ends: 2069 [2021-07-13 20:47:17,334 INFO L226 Difference]: Without dead ends: 2054 [2021-07-13 20:47:17,335 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:47:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-07-13 20:47:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1246. [2021-07-13 20:47:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-07-13 20:47:17,355 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-07-13 20:47:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:17,355 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-07-13 20:47:17,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:17,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-07-13 20:47:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:17,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:17,357 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:17,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 20:47:17,558 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-07-13 20:47:17,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:17,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980717476] [2021-07-13 20:47:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:17,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:17,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980717476] [2021-07-13 20:47:17,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980717476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:17,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439020505] [2021-07-13 20:47:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:17,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:17,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:17,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:17,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:17,955 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 19 treesize of output 11 [2021-07-13 20:47:17,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:17,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:17,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:17,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439020505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:17,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:17,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:17,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357808424] [2021-07-13 20:47:17,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:17,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:17,980 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:19,262 INFO L93 Difference]: Finished difference Result 1790 states and 5829 transitions. [2021-07-13 20:47:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:47:19,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:19,266 INFO L225 Difference]: With dead ends: 1790 [2021-07-13 20:47:19,266 INFO L226 Difference]: Without dead ends: 1775 [2021-07-13 20:47:19,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 990.4ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 20:47:19,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-07-13 20:47:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1249. [2021-07-13 20:47:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.3621794871794872) internal successors, (4196), 1248 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4196 transitions. [2021-07-13 20:47:19,284 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4196 transitions. Word has length 26 [2021-07-13 20:47:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:19,284 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4196 transitions. [2021-07-13 20:47:19,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4196 transitions. [2021-07-13 20:47:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:19,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:19,287 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:19,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 20:47:19,487 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-07-13 20:47:19,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:19,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820190500] [2021-07-13 20:47:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:19,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820190500] [2021-07-13 20:47:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820190500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401093692] [2021-07-13 20:47:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:19,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:19,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:19,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:19,819 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 19 treesize of output 19 [2021-07-13 20:47:19,821 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:19,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:19,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:19,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:47:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:19,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401093692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:19,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:19,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:19,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696915283] [2021-07-13 20:47:19,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:19,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:19,873 INFO L87 Difference]: Start difference. First operand 1249 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:20,973 INFO L93 Difference]: Finished difference Result 2008 states and 6519 transitions. [2021-07-13 20:47:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:47:20,974 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:20,977 INFO L225 Difference]: With dead ends: 2008 [2021-07-13 20:47:20,977 INFO L226 Difference]: Without dead ends: 1993 [2021-07-13 20:47:20,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 917.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:47:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-07-13 20:47:20,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1246. [2021-07-13 20:47:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-07-13 20:47:20,997 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-07-13 20:47:20,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:20,998 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-07-13 20:47:20,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-07-13 20:47:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:21,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:21,000 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:21,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,204 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:21,205 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-07-13 20:47:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:21,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517333148] [2021-07-13 20:47:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:21,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517333148] [2021-07-13 20:47:21,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517333148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790912952] [2021-07-13 20:47:21,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:21,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:21,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:21,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:21,617 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 21 treesize of output 11 [2021-07-13 20:47:21,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:21,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:21,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790912952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:21,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:21,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:47:21,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43189779] [2021-07-13 20:47:21,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:21,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:21,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:21,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:21,639 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:23,194 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-07-13 20:47:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:47:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:47:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:23,199 INFO L225 Difference]: With dead ends: 2877 [2021-07-13 20:47:23,199 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 20:47:23,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1324.6ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:47:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 20:47:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-07-13 20:47:23,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-07-13 20:47:23,223 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-07-13 20:47:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:23,223 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-07-13 20:47:23,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-07-13 20:47:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:23,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:23,225 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:23,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 20:47:23,426 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:23,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:23,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-07-13 20:47:23,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:23,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277732691] [2021-07-13 20:47:23,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:23,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277732691] [2021-07-13 20:47:23,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277732691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:23,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675947527] [2021-07-13 20:47:23,602 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:23,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:23,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:23,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:23,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:23,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:23,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:23,758 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 21 treesize of output 11 [2021-07-13 20:47:23,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:23,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:23,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:23,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:23,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675947527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:23,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:23,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:47:23,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552843588] [2021-07-13 20:47:23,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:23,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:23,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:23,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:23,783 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:25,256 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-07-13 20:47:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:47:25,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:47:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:25,262 INFO L225 Difference]: With dead ends: 2732 [2021-07-13 20:47:25,262 INFO L226 Difference]: Without dead ends: 2687 [2021-07-13 20:47:25,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1234.5ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:47:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-07-13 20:47:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-07-13 20:47:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-07-13 20:47:25,286 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-07-13 20:47:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:25,286 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-07-13 20:47:25,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-07-13 20:47:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:25,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:25,289 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:25,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 20:47:25,489 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-07-13 20:47:25,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:25,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082900719] [2021-07-13 20:47:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082900719] [2021-07-13 20:47:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082900719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449610161] [2021-07-13 20:47:25,673 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:25,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:25,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:25,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-13 20:47:25,822 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:47:25,837 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-07-13 20:47:25,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:25,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:47:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:25,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449610161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:25,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:25,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:47:25,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909892831] [2021-07-13 20:47:25,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:25,879 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:27,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:27,727 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-07-13 20:47:27,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:47:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:47:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:27,732 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 20:47:27,733 INFO L226 Difference]: Without dead ends: 2968 [2021-07-13 20:47:27,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1585.1ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:47:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-07-13 20:47:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-07-13 20:47:27,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:27,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-07-13 20:47:27,758 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-07-13 20:47:27,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:27,758 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-07-13 20:47:27,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-07-13 20:47:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:27,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:27,760 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:27,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 20:47:27,961 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:27,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-07-13 20:47:27,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:27,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744193649] [2021-07-13 20:47:27,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:28,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:28,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744193649] [2021-07-13 20:47:28,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744193649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:28,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132780411] [2021-07-13 20:47:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:28,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:28,330 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 19 treesize of output 11 [2021-07-13 20:47:28,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:28,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:28,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:28,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:28,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132780411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:28,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:28,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:28,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708784200] [2021-07-13 20:47:28,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:28,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:28,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:28,352 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:28,775 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-07-13 20:47:28,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:47:28,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:28,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:28,778 INFO L225 Difference]: With dead ends: 1654 [2021-07-13 20:47:28,778 INFO L226 Difference]: Without dead ends: 1639 [2021-07-13 20:47:28,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:47:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-07-13 20:47:28,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-07-13 20:47:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-07-13 20:47:28,796 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-07-13 20:47:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:28,796 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-07-13 20:47:28,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-07-13 20:47:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:28,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:28,798 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:29,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:29,001 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:29,001 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-07-13 20:47:29,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:29,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229746048] [2021-07-13 20:47:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:29,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:29,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229746048] [2021-07-13 20:47:29,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229746048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:29,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579689684] [2021-07-13 20:47:29,170 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:47:29,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:29,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:29,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:29,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:29,356 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 [2021-07-13 20:47:29,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:29,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:29,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:29,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:100 [2021-07-13 20:47:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:29,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579689684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:29,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:29,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:29,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51817138] [2021-07-13 20:47:29,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:29,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:29,501 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-07-13 20:47:30,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:30,885 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-07-13 20:47:30,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:47:30,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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 26 [2021-07-13 20:47:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:30,889 INFO L225 Difference]: With dead ends: 2013 [2021-07-13 20:47:30,889 INFO L226 Difference]: Without dead ends: 1983 [2021-07-13 20:47:30,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1240.3ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:47:30,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-07-13 20:47:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-07-13 20:47:30,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-07-13 20:47:30,909 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-07-13 20:47:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:30,909 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-07-13 20:47:30,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) 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) [2021-07-13 20:47:30,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-07-13 20:47:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:30,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:30,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:31,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:31,113 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-07-13 20:47:31,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:31,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169691779] [2021-07-13 20:47:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:31,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:31,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:31,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169691779] [2021-07-13 20:47:31,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169691779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:31,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096115581] [2021-07-13 20:47:31,277 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:31,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:31,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:31,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:47:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:31,455 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:31,456 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 [2021-07-13 20:47:31,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:31,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:31,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:31,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-13 20:47:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:31,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096115581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:31,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:31,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:47:31,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506233560] [2021-07-13 20:47:31,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:31,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:31,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:31,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:31,542 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:32,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:32,812 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-07-13 20:47:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:47:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:47:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:32,815 INFO L225 Difference]: With dead ends: 2000 [2021-07-13 20:47:32,815 INFO L226 Difference]: Without dead ends: 1985 [2021-07-13 20:47:32,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:47:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-07-13 20:47:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-07-13 20:47:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-07-13 20:47:32,836 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-07-13 20:47:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:32,836 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-07-13 20:47:32,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-07-13 20:47:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:32,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:32,838 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:33,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:33,053 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-07-13 20:47:33,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:33,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881530014] [2021-07-13 20:47:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:33,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881530014] [2021-07-13 20:47:33,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881530014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:33,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900490164] [2021-07-13 20:47:33,237 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:33,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:33,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:33,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:33,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:33,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:33,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:33,411 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 19 treesize of output 11 [2021-07-13 20:47:33,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:33,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:33,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:33,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:33,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900490164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:33,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:33,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:47:33,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357507677] [2021-07-13 20:47:33,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:33,437 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:34,434 INFO L93 Difference]: Finished difference Result 2049 states and 6731 transitions. [2021-07-13 20:47:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:47:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:34,437 INFO L225 Difference]: With dead ends: 2049 [2021-07-13 20:47:34,438 INFO L226 Difference]: Without dead ends: 2034 [2021-07-13 20:47:34,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 912.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:47:34,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-07-13 20:47:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1298. [2021-07-13 20:47:34,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:34,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-07-13 20:47:34,458 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-07-13 20:47:34,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:34,458 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-07-13 20:47:34,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-07-13 20:47:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:34,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:34,460 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:34,661 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 17 times [2021-07-13 20:47:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677393023] [2021-07-13 20:47:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:34,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677393023] [2021-07-13 20:47:34,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677393023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:34,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644541205] [2021-07-13 20:47:34,842 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:34,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:34,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:35,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:35,066 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 19 treesize of output 11 [2021-07-13 20:47:35,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:35,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:35,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:35,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644541205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:35,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:35,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:35,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191935531] [2021-07-13 20:47:35,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:35,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:35,089 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:35,972 INFO L93 Difference]: Finished difference Result 1774 states and 5862 transitions. [2021-07-13 20:47:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:47:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:35,975 INFO L225 Difference]: With dead ends: 1774 [2021-07-13 20:47:35,975 INFO L226 Difference]: Without dead ends: 1759 [2021-07-13 20:47:35,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 806.7ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:47:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-07-13 20:47:35,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1301. [2021-07-13 20:47:35,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3953846153846152) internal successors, (4414), 1300 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4414 transitions. [2021-07-13 20:47:35,994 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4414 transitions. Word has length 26 [2021-07-13 20:47:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:35,994 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4414 transitions. [2021-07-13 20:47:35,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4414 transitions. [2021-07-13 20:47:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:35,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:35,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:36,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-13 20:47:36,196 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 18 times [2021-07-13 20:47:36,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:36,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461911255] [2021-07-13 20:47:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:36,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461911255] [2021-07-13 20:47:36,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461911255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505898685] [2021-07-13 20:47:36,372 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:36,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:36,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:36,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:36,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:36,512 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 19 treesize of output 19 [2021-07-13 20:47:36,513 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:36,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:36,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:36,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:47:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505898685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:36,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616681778] [2021-07-13 20:47:36,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:36,558 INFO L87 Difference]: Start difference. First operand 1301 states and 4414 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:37,484 INFO L93 Difference]: Finished difference Result 2057 states and 6754 transitions. [2021-07-13 20:47:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:47:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-07-13 20:47:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:37,488 INFO L225 Difference]: With dead ends: 2057 [2021-07-13 20:47:37,488 INFO L226 Difference]: Without dead ends: 2042 [2021-07-13 20:47:37,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:47:37,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-07-13 20:47:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1295. [2021-07-13 20:47:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.39258114374034) internal successors, (4390), 1294 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4390 transitions. [2021-07-13 20:47:37,509 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4390 transitions. Word has length 26 [2021-07-13 20:47:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:37,510 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4390 transitions. [2021-07-13 20:47:37,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4390 transitions. [2021-07-13 20:47:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:37,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:37,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:37,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:37,717 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:37,717 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-07-13 20:47:37,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:37,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878794914] [2021-07-13 20:47:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:37,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:37,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878794914] [2021-07-13 20:47:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878794914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:37,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120442286] [2021-07-13 20:47:37,911 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:47:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:37,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:38,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:38,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:38,085 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 19 treesize of output 11 [2021-07-13 20:47:38,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:38,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:38,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:38,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120442286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:38,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:38,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711347715] [2021-07-13 20:47:38,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:38,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:38,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:38,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:38,103 INFO L87 Difference]: Start difference. First operand 1295 states and 4390 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:38,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:38,530 INFO L93 Difference]: Finished difference Result 1746 states and 5752 transitions. [2021-07-13 20:47:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:47:38,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:38,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:38,533 INFO L225 Difference]: With dead ends: 1746 [2021-07-13 20:47:38,533 INFO L226 Difference]: Without dead ends: 1725 [2021-07-13 20:47:38,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:47:38,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-07-13 20:47:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1336. [2021-07-13 20:47:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.3872659176029964) internal successors, (4522), 1335 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:38,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4522 transitions. [2021-07-13 20:47:38,567 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4522 transitions. Word has length 26 [2021-07-13 20:47:38,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:38,567 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4522 transitions. [2021-07-13 20:47:38,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:38,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4522 transitions. [2021-07-13 20:47:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:38,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:38,570 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:38,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:38,778 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-07-13 20:47:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:38,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917496935] [2021-07-13 20:47:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:38,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917496935] [2021-07-13 20:47:38,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917496935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:38,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716852078] [2021-07-13 20:47:38,957 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:38,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:38,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:38,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 20:47:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:39,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:39,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-07-13 20:47:39,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:39,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:39,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:39,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-13 20:47:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:39,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716852078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:39,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:39,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:47:39,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793248465] [2021-07-13 20:47:39,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:39,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:39,219 INFO L87 Difference]: Start difference. First operand 1336 states and 4522 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:40,228 INFO L93 Difference]: Finished difference Result 2131 states and 6881 transitions. [2021-07-13 20:47:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:47:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:47:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:40,232 INFO L225 Difference]: With dead ends: 2131 [2021-07-13 20:47:40,233 INFO L226 Difference]: Without dead ends: 2106 [2021-07-13 20:47:40,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 818.0ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:47:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-07-13 20:47:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-07-13 20:47:40,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3919821826280625) internal successors, (4569), 1347 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:40,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4569 transitions. [2021-07-13 20:47:40,256 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4569 transitions. Word has length 26 [2021-07-13 20:47:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:40,256 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4569 transitions. [2021-07-13 20:47:40,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4569 transitions. [2021-07-13 20:47:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:40,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:40,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:40,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:40,459 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:40,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:40,460 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 21 times [2021-07-13 20:47:40,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:40,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76909742] [2021-07-13 20:47:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76909742] [2021-07-13 20:47:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76909742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864093810] [2021-07-13 20:47:40,656 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:40,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:47:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:40,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:40,799 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 [2021-07-13 20:47:40,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:40,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:40,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:40,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-13 20:47:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:40,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864093810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:40,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:40,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:47:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286397403] [2021-07-13 20:47:40,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:40,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:40,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:40,924 INFO L87 Difference]: Start difference. First operand 1348 states and 4569 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:41,701 INFO L93 Difference]: Finished difference Result 1900 states and 6269 transitions. [2021-07-13 20:47:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:47:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:47:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:41,705 INFO L225 Difference]: With dead ends: 1900 [2021-07-13 20:47:41,705 INFO L226 Difference]: Without dead ends: 1875 [2021-07-13 20:47:41,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 760.5ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:47:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-13 20:47:41,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1361. [2021-07-13 20:47:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.398529411764706) internal successors, (4622), 1360 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4622 transitions. [2021-07-13 20:47:41,725 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4622 transitions. Word has length 26 [2021-07-13 20:47:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:41,725 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4622 transitions. [2021-07-13 20:47:41,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:47:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4622 transitions. [2021-07-13 20:47:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:41,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:41,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:41,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:41,927 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 22 times [2021-07-13 20:47:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:41,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737356150] [2021-07-13 20:47:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:42,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:42,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737356150] [2021-07-13 20:47:42,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737356150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345954955] [2021-07-13 20:47:42,105 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:42,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:42,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:42,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:42,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:42,273 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 19 treesize of output 11 [2021-07-13 20:47:42,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:42,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:42,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:42,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:42,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345954955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:42,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:42,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622831807] [2021-07-13 20:47:42,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:42,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:42,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:42,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:42,294 INFO L87 Difference]: Start difference. First operand 1361 states and 4622 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:42,673 INFO L93 Difference]: Finished difference Result 1726 states and 5748 transitions. [2021-07-13 20:47:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:47:42,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:42,676 INFO L225 Difference]: With dead ends: 1726 [2021-07-13 20:47:42,676 INFO L226 Difference]: Without dead ends: 1711 [2021-07-13 20:47:42,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:47:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-07-13 20:47:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1372. [2021-07-13 20:47:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3982494529540483) internal successors, (4659), 1371 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4659 transitions. [2021-07-13 20:47:42,696 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4659 transitions. Word has length 26 [2021-07-13 20:47:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:42,696 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4659 transitions. [2021-07-13 20:47:42,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4659 transitions. [2021-07-13 20:47:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:42,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:42,698 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:42,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 20:47:42,900 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:42,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 23 times [2021-07-13 20:47:42,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:42,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506217928] [2021-07-13 20:47:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:43,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506217928] [2021-07-13 20:47:43,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506217928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:43,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822287608] [2021-07-13 20:47:43,105 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:43,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:47:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:43,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:43,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:43,285 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 19 treesize of output 19 [2021-07-13 20:47:43,286 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:43,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:43,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:43,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:47:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:43,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822287608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:43,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:43,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:43,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752369619] [2021-07-13 20:47:43,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:43,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:43,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:43,332 INFO L87 Difference]: Start difference. First operand 1372 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:44,112 INFO L93 Difference]: Finished difference Result 2060 states and 6782 transitions. [2021-07-13 20:47:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:47:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:44,116 INFO L225 Difference]: With dead ends: 2060 [2021-07-13 20:47:44,116 INFO L226 Difference]: Without dead ends: 2041 [2021-07-13 20:47:44,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:47:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-07-13 20:47:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1373. [2021-07-13 20:47:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.401603498542274) internal successors, (4667), 1372 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4667 transitions. [2021-07-13 20:47:44,138 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4667 transitions. Word has length 26 [2021-07-13 20:47:44,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:44,138 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4667 transitions. [2021-07-13 20:47:44,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4667 transitions. [2021-07-13 20:47:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:44,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:44,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:44,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:44,345 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:44,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:44,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 24 times [2021-07-13 20:47:44,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:44,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58331944] [2021-07-13 20:47:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:44,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58331944] [2021-07-13 20:47:44,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58331944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:44,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931088779] [2021-07-13 20:47:44,516 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:44,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:44,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:44,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:44,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:44,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:44,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:44,666 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 19 treesize of output 19 [2021-07-13 20:47:44,668 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:44,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:44,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:44,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:47:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931088779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:47:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397063037] [2021-07-13 20:47:44,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:44,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:44,714 INFO L87 Difference]: Start difference. First operand 1373 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:45,355 INFO L93 Difference]: Finished difference Result 1917 states and 6334 transitions. [2021-07-13 20:47:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:47:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:45,358 INFO L225 Difference]: With dead ends: 1917 [2021-07-13 20:47:45,358 INFO L226 Difference]: Without dead ends: 1892 [2021-07-13 20:47:45,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 615.8ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:47:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-07-13 20:47:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1379. [2021-07-13 20:47:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.399854862119013) internal successors, (4685), 1378 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4685 transitions. [2021-07-13 20:47:45,378 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4685 transitions. Word has length 26 [2021-07-13 20:47:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:45,378 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4685 transitions. [2021-07-13 20:47:45,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4685 transitions. [2021-07-13 20:47:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:45,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:45,380 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:45,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:45,581 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:45,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-07-13 20:47:45,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:45,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770330411] [2021-07-13 20:47:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:45,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:45,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:45,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770330411] [2021-07-13 20:47:45,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770330411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:45,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636376896] [2021-07-13 20:47:45,803 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:45,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:47:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:45,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:45,950 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 21 treesize of output 11 [2021-07-13 20:47:45,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:45,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:45,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:45,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:45,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636376896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:45,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:45,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:47:45,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054058183] [2021-07-13 20:47:45,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:45,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:45,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:45,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:45,968 INFO L87 Difference]: Start difference. First operand 1379 states and 4685 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:46,691 INFO L93 Difference]: Finished difference Result 1799 states and 5934 transitions. [2021-07-13 20:47:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:47:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:46,694 INFO L225 Difference]: With dead ends: 1799 [2021-07-13 20:47:46,694 INFO L226 Difference]: Without dead ends: 1773 [2021-07-13 20:47:46,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 739.0ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:47:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-07-13 20:47:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1391. [2021-07-13 20:47:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-07-13 20:47:46,713 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-07-13 20:47:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:46,713 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-07-13 20:47:46,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-07-13 20:47:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:46,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:46,716 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:46,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:46,916 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:46,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:46,916 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-07-13 20:47:46,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:46,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300303641] [2021-07-13 20:47:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:47,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:47,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300303641] [2021-07-13 20:47:47,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300303641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:47,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876715972] [2021-07-13 20:47:47,165 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:47,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:47,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:47,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:47,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:47,302 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 21 treesize of output 11 [2021-07-13 20:47:47,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:47,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:47,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:47,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:47,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876715972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:47,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:47,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:47:47,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443378294] [2021-07-13 20:47:47,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:47,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:47,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:47,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:47,326 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:48,297 INFO L93 Difference]: Finished difference Result 1991 states and 6577 transitions. [2021-07-13 20:47:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:47:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:48,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:48,301 INFO L225 Difference]: With dead ends: 1991 [2021-07-13 20:47:48,301 INFO L226 Difference]: Without dead ends: 1976 [2021-07-13 20:47:48,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 933.7ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:47:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-07-13 20:47:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1391. [2021-07-13 20:47:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-07-13 20:47:48,320 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-07-13 20:47:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:48,321 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-07-13 20:47:48,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-07-13 20:47:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:48,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:48,323 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:48,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:48,523 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:48,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:48,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 25 times [2021-07-13 20:47:48,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:48,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824403753] [2021-07-13 20:47:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:48,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:48,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824403753] [2021-07-13 20:47:48,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824403753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:48,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134561531] [2021-07-13 20:47:48,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:48,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:48,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:48,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:48,948 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 19 treesize of output 11 [2021-07-13 20:47:48,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:48,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:48,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:48,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:47:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:48,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134561531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:48,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:48,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101991495] [2021-07-13 20:47:48,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:48,971 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:49,641 INFO L93 Difference]: Finished difference Result 1897 states and 6187 transitions. [2021-07-13 20:47:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:47:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:49,644 INFO L225 Difference]: With dead ends: 1897 [2021-07-13 20:47:49,644 INFO L226 Difference]: Without dead ends: 1882 [2021-07-13 20:47:49,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:47:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-07-13 20:47:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1402. [2021-07-13 20:47:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.3954318344039973) internal successors, (4757), 1401 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:49,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4757 transitions. [2021-07-13 20:47:49,662 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4757 transitions. Word has length 26 [2021-07-13 20:47:49,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:49,663 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4757 transitions. [2021-07-13 20:47:49,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:49,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4757 transitions. [2021-07-13 20:47:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:49,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:49,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:49,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-13 20:47:49,880 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-07-13 20:47:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:49,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301019812] [2021-07-13 20:47:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:50,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:50,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301019812] [2021-07-13 20:47:50,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301019812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:50,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133498437] [2021-07-13 20:47:50,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:50,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:50,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:50,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:50,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:47:50,435 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:47:50,450 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-07-13 20:47:50,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:50,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-07-13 20:47:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:50,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133498437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:50,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:50,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 20:47:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637580577] [2021-07-13 20:47:50,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 20:47:50,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:50,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 20:47:50,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:47:50,506 INFO L87 Difference]: Start difference. First operand 1402 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:52,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:52,313 INFO L93 Difference]: Finished difference Result 2292 states and 7266 transitions. [2021-07-13 20:47:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:47:52,314 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:52,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:52,318 INFO L225 Difference]: With dead ends: 2292 [2021-07-13 20:47:52,318 INFO L226 Difference]: Without dead ends: 2248 [2021-07-13 20:47:52,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1614.8ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:47:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-07-13 20:47:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1409. [2021-07-13 20:47:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3963068181818183) internal successors, (4782), 1408 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4782 transitions. [2021-07-13 20:47:52,339 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4782 transitions. Word has length 26 [2021-07-13 20:47:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:52,339 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4782 transitions. [2021-07-13 20:47:52,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4782 transitions. [2021-07-13 20:47:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:52,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:52,341 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:52,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 20:47:52,542 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:52,542 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-07-13 20:47:52,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:52,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107706284] [2021-07-13 20:47:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:52,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:52,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107706284] [2021-07-13 20:47:52,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107706284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:52,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293827921] [2021-07-13 20:47:52,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:52,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:52,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:52,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:47:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:52,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:52,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:52,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:52,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:47:52,886 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:47:52,902 INFO L628 ElimStorePlain]: treesize reduction 15, result has 60.5 percent of original size [2021-07-13 20:47:52,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:52,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:35 [2021-07-13 20:47:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:52,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293827921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:52,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:52,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:47:52,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037039397] [2021-07-13 20:47:52,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:47:52,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:47:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:47:52,956 INFO L87 Difference]: Start difference. First operand 1409 states and 4782 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:47:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:54,226 INFO L93 Difference]: Finished difference Result 2493 states and 8039 transitions. [2021-07-13 20:47:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:47:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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 26 [2021-07-13 20:47:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:54,231 INFO L225 Difference]: With dead ends: 2493 [2021-07-13 20:47:54,231 INFO L226 Difference]: Without dead ends: 2478 [2021-07-13 20:47:54,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1108.6ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:47:54,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-07-13 20:47:54,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1419. [2021-07-13 20:47:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3970380818053596) internal successors, (4817), 1418 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4817 transitions. [2021-07-13 20:47:54,253 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4817 transitions. Word has length 26 [2021-07-13 20:47:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4817 transitions. [2021-07-13 20:47:54,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) 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) [2021-07-13 20:47:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4817 transitions. [2021-07-13 20:47:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:54,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:54,255 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:54,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,456 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 558815383, now seen corresponding path program 26 times [2021-07-13 20:47:54,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:54,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498882601] [2021-07-13 20:47:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:54,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498882601] [2021-07-13 20:47:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498882601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247065007] [2021-07-13 20:47:54,640 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:54,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:47:54,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:47:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:54,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:54,824 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 35 [2021-07-13 20:47:54,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:54,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:54,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:54,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:105 [2021-07-13 20:47:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:54,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247065007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:54,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:54,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:47:54,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948155554] [2021-07-13 20:47:54,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:47:54,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:54,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:47:54,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:47:54,957 INFO L87 Difference]: Start difference. First operand 1419 states and 4817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:56,777 INFO L93 Difference]: Finished difference Result 2315 states and 7376 transitions. [2021-07-13 20:47:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:47:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-07-13 20:47:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:56,781 INFO L225 Difference]: With dead ends: 2315 [2021-07-13 20:47:56,781 INFO L226 Difference]: Without dead ends: 2281 [2021-07-13 20:47:56,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1584.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:47:56,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-07-13 20:47:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1435. [2021-07-13 20:47:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.406555090655509) internal successors, (4885), 1434 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4885 transitions. [2021-07-13 20:47:56,806 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4885 transitions. Word has length 26 [2021-07-13 20:47:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:56,806 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4885 transitions. [2021-07-13 20:47:56,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4885 transitions. [2021-07-13 20:47:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:56,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:56,808 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:57,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:57,022 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 27 times [2021-07-13 20:47:57,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:57,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269415356] [2021-07-13 20:47:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:57,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269415356] [2021-07-13 20:47:57,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269415356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:57,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916310616] [2021-07-13 20:47:57,165 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:57,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:47:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:57,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:47:57,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:57,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:57,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:57,324 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 [2021-07-13 20:47:57,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:47:57,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:57,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:47:57,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:65 [2021-07-13 20:47:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:57,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916310616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:57,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:57,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:47:57,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754814516] [2021-07-13 20:47:57,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:47:57,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:47:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:47:57,427 INFO L87 Difference]: Start difference. First operand 1435 states and 4885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:47:58,565 INFO L93 Difference]: Finished difference Result 2365 states and 7650 transitions. [2021-07-13 20:47:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:47:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:47:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:47:58,569 INFO L225 Difference]: With dead ends: 2365 [2021-07-13 20:47:58,569 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 20:47:58,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:47:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 20:47:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1429. [2021-07-13 20:47:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.40406162464986) internal successors, (4861), 1428 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4861 transitions. [2021-07-13 20:47:58,593 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4861 transitions. Word has length 26 [2021-07-13 20:47:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:47:58,593 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4861 transitions. [2021-07-13 20:47:58,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:47:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4861 transitions. [2021-07-13 20:47:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:47:58,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:47:58,595 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:47:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:58,795 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:47:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:47:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-07-13 20:47:58,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:47:58,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136725807] [2021-07-13 20:47:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:47:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:47:58,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:58,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:47:58,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136725807] [2021-07-13 20:47:58,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136725807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:58,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397676239] [2021-07-13 20:47:58,955 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:47:58,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:47:58,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:47:58,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:47:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:47:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:47:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:59,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:47:59,098 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 21 treesize of output 11 [2021-07-13 20:47:59,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:47:59,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:47:59,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:47:59,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:47:59,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:47:59,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397676239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:47:59,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:47:59,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:47:59,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095966609] [2021-07-13 20:47:59,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:47:59,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:47:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:47:59,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:47:59,121 INFO L87 Difference]: Start difference. First operand 1429 states and 4861 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:00,446 INFO L93 Difference]: Finished difference Result 3028 states and 9674 transitions. [2021-07-13 20:48:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:48:00,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:48:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:00,452 INFO L225 Difference]: With dead ends: 3028 [2021-07-13 20:48:00,452 INFO L226 Difference]: Without dead ends: 2992 [2021-07-13 20:48:00,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1093.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:48:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-07-13 20:48:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1562. [2021-07-13 20:48:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.42152466367713) internal successors, (5341), 1561 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5341 transitions. [2021-07-13 20:48:00,480 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5341 transitions. Word has length 26 [2021-07-13 20:48:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:00,480 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 5341 transitions. [2021-07-13 20:48:00,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5341 transitions. [2021-07-13 20:48:00,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:00,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:00,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:00,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:00,683 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:00,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-07-13 20:48:00,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509760978] [2021-07-13 20:48:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:00,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:00,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509760978] [2021-07-13 20:48:00,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509760978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:00,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600644720] [2021-07-13 20:48:00,843 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:00,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:48:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:00,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:00,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:00,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:00,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-13 20:48:00,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:00,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:00,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:00,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:48:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:01,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600644720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:01,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:01,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-07-13 20:48:01,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603575111] [2021-07-13 20:48:01,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:01,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:01,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:01,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:01,014 INFO L87 Difference]: Start difference. First operand 1562 states and 5341 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:02,672 INFO L93 Difference]: Finished difference Result 3412 states and 10776 transitions. [2021-07-13 20:48:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:48:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-07-13 20:48:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:02,678 INFO L225 Difference]: With dead ends: 3412 [2021-07-13 20:48:02,678 INFO L226 Difference]: Without dead ends: 3355 [2021-07-13 20:48:02,678 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1362.8ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:48:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-07-13 20:48:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1585. [2021-07-13 20:48:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.4242424242424243) internal successors, (5424), 1584 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5424 transitions. [2021-07-13 20:48:02,708 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5424 transitions. Word has length 26 [2021-07-13 20:48:02,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:02,709 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5424 transitions. [2021-07-13 20:48:02,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5424 transitions. [2021-07-13 20:48:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:02,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:02,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:02,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 20:48:02,911 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 28 times [2021-07-13 20:48:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:02,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972213823] [2021-07-13 20:48:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972213823] [2021-07-13 20:48:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972213823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729714087] [2021-07-13 20:48:03,069 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:03,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:03,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:03,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:03,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:03,241 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 19 treesize of output 11 [2021-07-13 20:48:03,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:03,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:03,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:03,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:48:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:03,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729714087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:03,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:03,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:48:03,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998837327] [2021-07-13 20:48:03,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:03,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:03,263 INFO L87 Difference]: Start difference. First operand 1585 states and 5424 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:03,944 INFO L93 Difference]: Finished difference Result 2011 states and 6730 transitions. [2021-07-13 20:48:03,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:48:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:03,948 INFO L225 Difference]: With dead ends: 2011 [2021-07-13 20:48:03,948 INFO L226 Difference]: Without dead ends: 1996 [2021-07-13 20:48:03,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:48:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-07-13 20:48:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1593. [2021-07-13 20:48:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.423994974874372) internal successors, (5451), 1592 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5451 transitions. [2021-07-13 20:48:03,969 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5451 transitions. Word has length 26 [2021-07-13 20:48:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:03,969 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5451 transitions. [2021-07-13 20:48:03,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5451 transitions. [2021-07-13 20:48:03,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:03,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:03,972 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:04,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 20:48:04,172 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -916076553, now seen corresponding path program 29 times [2021-07-13 20:48:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631617159] [2021-07-13 20:48:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:04,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:04,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631617159] [2021-07-13 20:48:04,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631617159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100799856] [2021-07-13 20:48:04,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:04,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:04,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:04,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:04,473 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 19 treesize of output 19 [2021-07-13 20:48:04,474 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:04,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:04,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:04,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:48:04,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:04,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100799856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:04,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:04,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:48:04,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393733006] [2021-07-13 20:48:04,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:04,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:04,519 INFO L87 Difference]: Start difference. First operand 1593 states and 5451 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:05,429 INFO L93 Difference]: Finished difference Result 2467 states and 8081 transitions. [2021-07-13 20:48:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:48:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:05,433 INFO L225 Difference]: With dead ends: 2467 [2021-07-13 20:48:05,434 INFO L226 Difference]: Without dead ends: 2448 [2021-07-13 20:48:05,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 675.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:48:05,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-07-13 20:48:05,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1588. [2021-07-13 20:48:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.421550094517958) internal successors, (5430), 1587 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5430 transitions. [2021-07-13 20:48:05,460 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5430 transitions. Word has length 26 [2021-07-13 20:48:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:05,460 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5430 transitions. [2021-07-13 20:48:05,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5430 transitions. [2021-07-13 20:48:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:05,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:05,463 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:05,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 20:48:05,677 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:05,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 30 times [2021-07-13 20:48:05,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:05,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166849546] [2021-07-13 20:48:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:05,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:05,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166849546] [2021-07-13 20:48:05,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166849546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:05,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944122891] [2021-07-13 20:48:05,808 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:05,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:05,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:05,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:05,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:05,979 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 [2021-07-13 20:48:05,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:05,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:05,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:06,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:89 [2021-07-13 20:48:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:06,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944122891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:06,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:06,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:48:06,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068912054] [2021-07-13 20:48:06,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:06,102 INFO L87 Difference]: Start difference. First operand 1588 states and 5430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:07,734 INFO L93 Difference]: Finished difference Result 2521 states and 8150 transitions. [2021-07-13 20:48:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:48:07,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-07-13 20:48:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:07,739 INFO L225 Difference]: With dead ends: 2521 [2021-07-13 20:48:07,739 INFO L226 Difference]: Without dead ends: 2452 [2021-07-13 20:48:07,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1331.9ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:48:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-07-13 20:48:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1576. [2021-07-13 20:48:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.420952380952381) internal successors, (5388), 1575 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5388 transitions. [2021-07-13 20:48:07,763 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5388 transitions. Word has length 26 [2021-07-13 20:48:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:07,763 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5388 transitions. [2021-07-13 20:48:07,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5388 transitions. [2021-07-13 20:48:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:07,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:07,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:07,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 20:48:07,966 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:07,966 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-07-13 20:48:07,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:07,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562364710] [2021-07-13 20:48:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:08,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562364710] [2021-07-13 20:48:08,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562364710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:08,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232172883] [2021-07-13 20:48:08,191 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:08,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:48:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:08,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:08,345 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 21 treesize of output 11 [2021-07-13 20:48:08,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:08,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:08,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:08,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:08,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232172883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:08,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:08,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:48:08,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754122568] [2021-07-13 20:48:08,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:08,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:08,364 INFO L87 Difference]: Start difference. First operand 1576 states and 5388 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:09,336 INFO L93 Difference]: Finished difference Result 2032 states and 6722 transitions. [2021-07-13 20:48:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:48:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:09,340 INFO L225 Difference]: With dead ends: 2032 [2021-07-13 20:48:09,341 INFO L226 Difference]: Without dead ends: 2010 [2021-07-13 20:48:09,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-07-13 20:48:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1568. [2021-07-13 20:48:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:09,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-07-13 20:48:09,362 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-07-13 20:48:09,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:09,363 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-07-13 20:48:09,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:09,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-07-13 20:48:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:09,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:09,365 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:09,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 20:48:09,566 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:09,566 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-07-13 20:48:09,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:09,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039050163] [2021-07-13 20:48:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:09,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:09,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039050163] [2021-07-13 20:48:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039050163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:09,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575632576] [2021-07-13 20:48:09,789 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:09,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:09,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:09,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:09,939 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 21 treesize of output 11 [2021-07-13 20:48:09,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:09,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:09,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:09,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:09,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575632576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:09,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:09,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:48:09,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260190371] [2021-07-13 20:48:09,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:09,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:09,963 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:11,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:11,106 INFO L93 Difference]: Finished difference Result 2234 states and 7397 transitions. [2021-07-13 20:48:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:48:11,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:11,110 INFO L225 Difference]: With dead ends: 2234 [2021-07-13 20:48:11,110 INFO L226 Difference]: Without dead ends: 2219 [2021-07-13 20:48:11,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1043.9ms TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:48:11,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-07-13 20:48:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1568. [2021-07-13 20:48:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-07-13 20:48:11,133 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-07-13 20:48:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:11,133 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-07-13 20:48:11,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-07-13 20:48:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:11,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:11,136 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:11,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 20:48:11,338 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-07-13 20:48:11,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:11,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745541102] [2021-07-13 20:48:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:11,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745541102] [2021-07-13 20:48:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745541102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868696692] [2021-07-13 20:48:11,531 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:11,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:11,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:11,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:11,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:11,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:11,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:11,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:11,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:48:11,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:11,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:11,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:11,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-13 20:48:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:11,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868696692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:11,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:11,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-07-13 20:48:11,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608981321] [2021-07-13 20:48:11,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:11,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:11,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:11,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:11,741 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:13,430 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-07-13 20:48:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:15,326 INFO L93 Difference]: Finished difference Result 2979 states and 9505 transitions. [2021-07-13 20:48:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:48:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:15,331 INFO L225 Difference]: With dead ends: 2979 [2021-07-13 20:48:15,331 INFO L226 Difference]: Without dead ends: 2932 [2021-07-13 20:48:15,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 2877.1ms TimeCoverageRelationStatistics Valid=1084, Invalid=6056, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:48:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-07-13 20:48:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1584. [2021-07-13 20:48:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.4112444725205306) internal successors, (5400), 1583 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:15,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5400 transitions. [2021-07-13 20:48:15,362 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5400 transitions. Word has length 26 [2021-07-13 20:48:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:15,362 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5400 transitions. [2021-07-13 20:48:15,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:15,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5400 transitions. [2021-07-13 20:48:15,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:15,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:15,365 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:15,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 20:48:15,566 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-07-13 20:48:15,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:15,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359586104] [2021-07-13 20:48:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:15,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:15,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359586104] [2021-07-13 20:48:15,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359586104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:15,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852367822] [2021-07-13 20:48:15,756 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:15,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:48:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 20:48:15,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:15,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:15,971 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-07-13 20:48:15,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:16,106 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-13 20:48:16,106 INFO L628 ElimStorePlain]: treesize reduction 66, result has 54.8 percent of original size [2021-07-13 20:48:16,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:16,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:214 [2021-07-13 20:48:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:16,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852367822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:16,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:16,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-07-13 20:48:16,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763728937] [2021-07-13 20:48:16,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:48:16,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:16,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:48:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:48:16,395 INFO L87 Difference]: Start difference. First operand 1584 states and 5400 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) [2021-07-13 20:48:17,609 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-13 20:48:17,931 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-07-13 20:48:18,118 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-07-13 20:48:18,421 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-07-13 20:48:18,642 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-07-13 20:48:18,781 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-07-13 20:48:19,023 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-07-13 20:48:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:19,085 INFO L93 Difference]: Finished difference Result 2665 states and 8672 transitions. [2021-07-13 20:48:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:48:19,085 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 26 [2021-07-13 20:48:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:19,090 INFO L225 Difference]: With dead ends: 2665 [2021-07-13 20:48:19,090 INFO L226 Difference]: Without dead ends: 2635 [2021-07-13 20:48:19,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2565.3ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:48:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-13 20:48:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1595. [2021-07-13 20:48:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.417189460476788) internal successors, (5447), 1594 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5447 transitions. [2021-07-13 20:48:19,116 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5447 transitions. Word has length 26 [2021-07-13 20:48:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:19,117 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5447 transitions. [2021-07-13 20:48:19,117 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) [2021-07-13 20:48:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5447 transitions. [2021-07-13 20:48:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:19,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:19,119 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:19,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:19,320 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-07-13 20:48:19,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:19,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410846503] [2021-07-13 20:48:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:19,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:19,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410846503] [2021-07-13 20:48:19,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410846503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671721334] [2021-07-13 20:48:19,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:19,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:19,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:19,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:19,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:19,704 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 21 treesize of output 11 [2021-07-13 20:48:19,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:19,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:19,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:19,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671721334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:19,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:48:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147331753] [2021-07-13 20:48:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:19,729 INFO L87 Difference]: Start difference. First operand 1595 states and 5447 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:21,077 INFO L93 Difference]: Finished difference Result 2141 states and 7071 transitions. [2021-07-13 20:48:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:48:21,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:21,081 INFO L225 Difference]: With dead ends: 2141 [2021-07-13 20:48:21,081 INFO L226 Difference]: Without dead ends: 2126 [2021-07-13 20:48:21,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1124.5ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:48:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-07-13 20:48:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1599. [2021-07-13 20:48:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-07-13 20:48:21,105 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-07-13 20:48:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:21,106 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-07-13 20:48:21,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-07-13 20:48:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:21,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:21,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:21,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-13 20:48:21,309 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:21,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-07-13 20:48:21,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:21,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245207132] [2021-07-13 20:48:21,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:21,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:21,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245207132] [2021-07-13 20:48:21,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245207132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:21,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323455018] [2021-07-13 20:48:21,498 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:21,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:48:21,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:21,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:21,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:21,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:21,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:21,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:21,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-13 20:48:21,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:21,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:21,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:21,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-07-13 20:48:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:21,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323455018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:21,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:21,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-13 20:48:21,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201040507] [2021-07-13 20:48:21,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:48:21,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:21,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:48:21,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:48:21,774 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:22,773 INFO L93 Difference]: Finished difference Result 2310 states and 7701 transitions. [2021-07-13 20:48:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:48:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:22,777 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 20:48:22,778 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 20:48:22,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 881.2ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 20:48:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1599. [2021-07-13 20:48:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-07-13 20:48:22,802 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-07-13 20:48:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:22,802 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-07-13 20:48:22,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:22,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-07-13 20:48:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:22,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:22,804 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:23,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 20:48:23,005 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-07-13 20:48:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:23,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852015943] [2021-07-13 20:48:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:23,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852015943] [2021-07-13 20:48:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852015943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977760791] [2021-07-13 20:48:23,263 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:23,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:48:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:48:23,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:23,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-07-13 20:48:23,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:23,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:23,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:23,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-07-13 20:48:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977760791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:23,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:23,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:48:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849757658] [2021-07-13 20:48:23,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:23,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:23,446 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-07-13 20:48:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:25,481 INFO L93 Difference]: Finished difference Result 2882 states and 9198 transitions. [2021-07-13 20:48:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:48:25,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-07-13 20:48:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:25,486 INFO L225 Difference]: With dead ends: 2882 [2021-07-13 20:48:25,486 INFO L226 Difference]: Without dead ends: 2848 [2021-07-13 20:48:25,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1914.3ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:48:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-07-13 20:48:25,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1599. [2021-07-13 20:48:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4198998748435545) internal successors, (5465), 1598 states have internal predecessors, (5465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5465 transitions. [2021-07-13 20:48:25,513 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5465 transitions. Word has length 26 [2021-07-13 20:48:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:25,514 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5465 transitions. [2021-07-13 20:48:25,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-07-13 20:48:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5465 transitions. [2021-07-13 20:48:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:25,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:25,516 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:25,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 20:48:25,718 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-07-13 20:48:25,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:25,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55750085] [2021-07-13 20:48:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:25,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:25,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55750085] [2021-07-13 20:48:25,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55750085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:25,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343314752] [2021-07-13 20:48:25,864 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:48:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:26,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:26,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:26,038 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 19 treesize of output 11 [2021-07-13 20:48:26,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:26,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:26,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:26,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:48:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343314752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:26,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:26,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239680502] [2021-07-13 20:48:26,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:26,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:26,064 INFO L87 Difference]: Start difference. First operand 1599 states and 5465 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:27,012 INFO L93 Difference]: Finished difference Result 2462 states and 8155 transitions. [2021-07-13 20:48:27,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:48:27,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:27,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:27,017 INFO L225 Difference]: With dead ends: 2462 [2021-07-13 20:48:27,017 INFO L226 Difference]: Without dead ends: 2447 [2021-07-13 20:48:27,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 20:48:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-13 20:48:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1590. [2021-07-13 20:48:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.416614222781624) internal successors, (5429), 1589 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5429 transitions. [2021-07-13 20:48:27,042 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5429 transitions. Word has length 26 [2021-07-13 20:48:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5429 transitions. [2021-07-13 20:48:27,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5429 transitions. [2021-07-13 20:48:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:27,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:27,044 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:27,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:27,245 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:27,245 INFO L82 PathProgramCache]: Analyzing trace with hash -107626611, now seen corresponding path program 32 times [2021-07-13 20:48:27,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:27,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539411289] [2021-07-13 20:48:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:27,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539411289] [2021-07-13 20:48:27,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539411289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:27,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906319878] [2021-07-13 20:48:27,378 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:27,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:27,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:27,517 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 29 treesize of output 25 [2021-07-13 20:48:27,518 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:27,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:27,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:27,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-13 20:48:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:27,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906319878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:27,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:27,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:27,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478029865] [2021-07-13 20:48:27,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:27,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:27,558 INFO L87 Difference]: Start difference. First operand 1590 states and 5429 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:28,523 INFO L93 Difference]: Finished difference Result 2279 states and 7572 transitions. [2021-07-13 20:48:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:48:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:48:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:28,527 INFO L225 Difference]: With dead ends: 2279 [2021-07-13 20:48:28,527 INFO L226 Difference]: Without dead ends: 2264 [2021-07-13 20:48:28,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 826.2ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-13 20:48:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1583. [2021-07-13 20:48:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4140328697850824) internal successors, (5401), 1582 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5401 transitions. [2021-07-13 20:48:28,552 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5401 transitions. Word has length 26 [2021-07-13 20:48:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:28,552 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5401 transitions. [2021-07-13 20:48:28,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5401 transitions. [2021-07-13 20:48:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:28,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:28,555 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:28,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:28,765 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-07-13 20:48:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:28,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43838781] [2021-07-13 20:48:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:28,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43838781] [2021-07-13 20:48:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43838781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:28,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800750678] [2021-07-13 20:48:28,940 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:28,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:28,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:28,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:29,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:29,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:29,111 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 19 treesize of output 11 [2021-07-13 20:48:29,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:29,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:29,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:29,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-07-13 20:48:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:29,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800750678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:29,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:48:29,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580488363] [2021-07-13 20:48:29,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:29,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:29,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:29,130 INFO L87 Difference]: Start difference. First operand 1583 states and 5401 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:29,500 INFO L93 Difference]: Finished difference Result 2090 states and 6923 transitions. [2021-07-13 20:48:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:48:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:29,504 INFO L225 Difference]: With dead ends: 2090 [2021-07-13 20:48:29,504 INFO L226 Difference]: Without dead ends: 2069 [2021-07-13 20:48:29,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:48:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-07-13 20:48:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1559. [2021-07-13 20:48:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.4127086007702183) internal successors, (5317), 1558 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5317 transitions. [2021-07-13 20:48:29,527 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5317 transitions. Word has length 26 [2021-07-13 20:48:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:29,527 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 5317 transitions. [2021-07-13 20:48:29,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5317 transitions. [2021-07-13 20:48:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:29,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:29,529 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:29,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:29,735 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:29,735 INFO L82 PathProgramCache]: Analyzing trace with hash -550251037, now seen corresponding path program 34 times [2021-07-13 20:48:29,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:29,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532207336] [2021-07-13 20:48:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:29,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532207336] [2021-07-13 20:48:29,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532207336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036952787] [2021-07-13 20:48:29,865 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:48:29,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:30,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:30,026 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 19 treesize of output 11 [2021-07-13 20:48:30,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:30,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:30,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:30,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:48:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:30,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036952787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:30,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:30,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:48:30,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497413311] [2021-07-13 20:48:30,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:30,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:30,048 INFO L87 Difference]: Start difference. First operand 1559 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:30,501 INFO L93 Difference]: Finished difference Result 2051 states and 6824 transitions. [2021-07-13 20:48:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:48:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:30,505 INFO L225 Difference]: With dead ends: 2051 [2021-07-13 20:48:30,505 INFO L226 Difference]: Without dead ends: 2036 [2021-07-13 20:48:30,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:48:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-07-13 20:48:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1558. [2021-07-13 20:48:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.41233140655106) internal successors, (5313), 1557 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5313 transitions. [2021-07-13 20:48:30,527 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5313 transitions. Word has length 26 [2021-07-13 20:48:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:30,527 INFO L482 AbstractCegarLoop]: Abstraction has 1558 states and 5313 transitions. [2021-07-13 20:48:30,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5313 transitions. [2021-07-13 20:48:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:30,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:30,529 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:30,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:30,730 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:30,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2127183479, now seen corresponding path program 35 times [2021-07-13 20:48:30,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:30,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128175063] [2021-07-13 20:48:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:30,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:30,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128175063] [2021-07-13 20:48:30,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128175063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93735027] [2021-07-13 20:48:30,877 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:30,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:30,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:30,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:30,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:31,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:31,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:31,099 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 19 treesize of output 19 [2021-07-13 20:48:31,100 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:31,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:31,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:31,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-07-13 20:48:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:31,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93735027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:31,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:31,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-07-13 20:48:31,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381777269] [2021-07-13 20:48:31,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:31,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:31,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:31,144 INFO L87 Difference]: Start difference. First operand 1558 states and 5313 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:31,804 INFO L93 Difference]: Finished difference Result 2353 states and 7772 transitions. [2021-07-13 20:48:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:48:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:31,809 INFO L225 Difference]: With dead ends: 2353 [2021-07-13 20:48:31,809 INFO L226 Difference]: Without dead ends: 2334 [2021-07-13 20:48:31,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:48:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-07-13 20:48:31,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1541. [2021-07-13 20:48:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.4103896103896103) internal successors, (5252), 1540 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5252 transitions. [2021-07-13 20:48:31,833 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5252 transitions. Word has length 26 [2021-07-13 20:48:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:31,833 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5252 transitions. [2021-07-13 20:48:31,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5252 transitions. [2021-07-13 20:48:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:31,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:31,836 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:32,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:32,036 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-07-13 20:48:32,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:32,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414481026] [2021-07-13 20:48:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:32,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:32,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414481026] [2021-07-13 20:48:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414481026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:32,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069879749] [2021-07-13 20:48:32,152 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:32,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:32,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:32,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:32,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:32,300 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 [2021-07-13 20:48:32,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:32,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:32,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:32,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-07-13 20:48:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:32,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069879749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:32,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:32,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:48:32,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997313524] [2021-07-13 20:48:32,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:32,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:32,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:32,371 INFO L87 Difference]: Start difference. First operand 1541 states and 5252 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:32,826 INFO L93 Difference]: Finished difference Result 2055 states and 6840 transitions. [2021-07-13 20:48:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:48:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:48:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:32,829 INFO L225 Difference]: With dead ends: 2055 [2021-07-13 20:48:32,829 INFO L226 Difference]: Without dead ends: 2040 [2021-07-13 20:48:32,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:48:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-07-13 20:48:32,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1586. [2021-07-13 20:48:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.404416403785489) internal successors, (5396), 1585 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5396 transitions. [2021-07-13 20:48:32,851 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5396 transitions. Word has length 26 [2021-07-13 20:48:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:32,851 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5396 transitions. [2021-07-13 20:48:32,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5396 transitions. [2021-07-13 20:48:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:32,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:32,854 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:33,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-13 20:48:33,070 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 37 times [2021-07-13 20:48:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:33,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7192719] [2021-07-13 20:48:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:33,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7192719] [2021-07-13 20:48:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7192719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704699131] [2021-07-13 20:48:33,193 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:48:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:33,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:33,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:33,341 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 19 treesize of output 11 [2021-07-13 20:48:33,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:33,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:33,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:33,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:48:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704699131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:33,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:33,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101385004] [2021-07-13 20:48:33,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:33,362 INFO L87 Difference]: Start difference. First operand 1586 states and 5396 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:33,965 INFO L93 Difference]: Finished difference Result 2330 states and 7681 transitions. [2021-07-13 20:48:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:48:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:33,969 INFO L225 Difference]: With dead ends: 2330 [2021-07-13 20:48:33,969 INFO L226 Difference]: Without dead ends: 2315 [2021-07-13 20:48:33,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:48:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-07-13 20:48:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1587. [2021-07-13 20:48:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.4060529634300125) internal successors, (5402), 1586 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5402 transitions. [2021-07-13 20:48:33,995 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5402 transitions. Word has length 26 [2021-07-13 20:48:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:33,995 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5402 transitions. [2021-07-13 20:48:33,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5402 transitions. [2021-07-13 20:48:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:33,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:33,997 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:34,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-07-13 20:48:34,198 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:34,198 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-07-13 20:48:34,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:34,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150049308] [2021-07-13 20:48:34,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150049308] [2021-07-13 20:48:34,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150049308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647227757] [2021-07-13 20:48:34,329 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:34,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:34,449 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 [2021-07-13 20:48:34,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:34,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:34,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:34,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-07-13 20:48:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647227757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:34,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:34,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 20:48:34,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933095236] [2021-07-13 20:48:34,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:48:34,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:48:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:48:34,549 INFO L87 Difference]: Start difference. First operand 1587 states and 5402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:34,904 INFO L93 Difference]: Finished difference Result 2103 states and 7017 transitions. [2021-07-13 20:48:34,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:48:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 26 [2021-07-13 20:48:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:34,908 INFO L225 Difference]: With dead ends: 2103 [2021-07-13 20:48:34,908 INFO L226 Difference]: Without dead ends: 2088 [2021-07-13 20:48:34,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:48:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-07-13 20:48:34,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1590. [2021-07-13 20:48:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.409691629955947) internal successors, (5418), 1589 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5418 transitions. [2021-07-13 20:48:34,940 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5418 transitions. Word has length 26 [2021-07-13 20:48:34,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:34,940 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5418 transitions. [2021-07-13 20:48:34,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:34,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5418 transitions. [2021-07-13 20:48:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:34,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:34,942 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:35,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-07-13 20:48:35,143 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-07-13 20:48:35,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:35,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811806795] [2021-07-13 20:48:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811806795] [2021-07-13 20:48:35,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811806795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508364961] [2021-07-13 20:48:35,249 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:35,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:35,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:35,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:35,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:35,394 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 [2021-07-13 20:48:35,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:35,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:35,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:35,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-07-13 20:48:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:35,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508364961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:35,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:35,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 20:48:35,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489891453] [2021-07-13 20:48:35,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:48:35,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:35,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:48:35,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:48:35,494 INFO L87 Difference]: Start difference. First operand 1590 states and 5418 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:35,814 INFO L93 Difference]: Finished difference Result 2135 states and 7120 transitions. [2021-07-13 20:48:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:48:35,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-07-13 20:48:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:35,818 INFO L225 Difference]: With dead ends: 2135 [2021-07-13 20:48:35,818 INFO L226 Difference]: Without dead ends: 2120 [2021-07-13 20:48:35,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:48:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-07-13 20:48:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1608. [2021-07-13 20:48:35,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.4051026757934038) internal successors, (5472), 1607 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5472 transitions. [2021-07-13 20:48:35,841 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5472 transitions. Word has length 26 [2021-07-13 20:48:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:35,841 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5472 transitions. [2021-07-13 20:48:35,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5472 transitions. [2021-07-13 20:48:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:35,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:35,843 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:36,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:36,044 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-07-13 20:48:36,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:36,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116243126] [2021-07-13 20:48:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:36,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116243126] [2021-07-13 20:48:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116243126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:36,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331422693] [2021-07-13 20:48:36,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:36,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:36,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:36,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:36,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:36,341 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 19 treesize of output 11 [2021-07-13 20:48:36,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:36,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:36,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:36,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-07-13 20:48:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331422693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:36,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:36,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:48:36,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21347032] [2021-07-13 20:48:36,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:36,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:36,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:36,361 INFO L87 Difference]: Start difference. First operand 1608 states and 5472 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:36,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:36,772 INFO L93 Difference]: Finished difference Result 2064 states and 6890 transitions. [2021-07-13 20:48:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:48:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:36,776 INFO L225 Difference]: With dead ends: 2064 [2021-07-13 20:48:36,776 INFO L226 Difference]: Without dead ends: 2049 [2021-07-13 20:48:36,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 376.0ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:48:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-13 20:48:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1629. [2021-07-13 20:48:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.401105651105651) internal successors, (5537), 1628 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5537 transitions. [2021-07-13 20:48:36,798 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5537 transitions. Word has length 26 [2021-07-13 20:48:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:36,798 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5537 transitions. [2021-07-13 20:48:36,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5537 transitions. [2021-07-13 20:48:36,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:36,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:36,800 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:37,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:37,001 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-07-13 20:48:37,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:37,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866920875] [2021-07-13 20:48:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:37,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:37,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866920875] [2021-07-13 20:48:37,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866920875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516318010] [2021-07-13 20:48:37,170 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:37,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:37,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:37,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:37,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:37,313 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 19 treesize of output 19 [2021-07-13 20:48:37,314 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:37,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:37,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:37,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:48:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516318010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:37,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:37,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:48:37,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139459953] [2021-07-13 20:48:37,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:37,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:37,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:37,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:37,357 INFO L87 Difference]: Start difference. First operand 1629 states and 5537 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:37,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:37,877 INFO L93 Difference]: Finished difference Result 2357 states and 7803 transitions. [2021-07-13 20:48:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:48:37,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:37,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:37,883 INFO L225 Difference]: With dead ends: 2357 [2021-07-13 20:48:37,883 INFO L226 Difference]: Without dead ends: 2342 [2021-07-13 20:48:37,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:48:37,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-07-13 20:48:37,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1626. [2021-07-13 20:48:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.4024615384615386) internal successors, (5529), 1625 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5529 transitions. [2021-07-13 20:48:37,909 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5529 transitions. Word has length 26 [2021-07-13 20:48:37,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:37,909 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5529 transitions. [2021-07-13 20:48:37,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:37,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5529 transitions. [2021-07-13 20:48:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:37,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:37,912 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:38,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:38,128 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:38,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-07-13 20:48:38,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:38,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595121534] [2021-07-13 20:48:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:38,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:38,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595121534] [2021-07-13 20:48:38,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595121534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:38,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955153769] [2021-07-13 20:48:38,258 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:38,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 20:48:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:38,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:38,387 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 19 treesize of output 19 [2021-07-13 20:48:38,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:38,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:38,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:38,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:48:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955153769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:38,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:38,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:38,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374628860] [2021-07-13 20:48:38,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:38,431 INFO L87 Difference]: Start difference. First operand 1626 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:38,906 INFO L93 Difference]: Finished difference Result 2213 states and 7343 transitions. [2021-07-13 20:48:38,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:48:38,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:38,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:38,911 INFO L225 Difference]: With dead ends: 2213 [2021-07-13 20:48:38,911 INFO L226 Difference]: Without dead ends: 2188 [2021-07-13 20:48:38,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 413.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:48:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-13 20:48:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1626. [2021-07-13 20:48:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-07-13 20:48:38,935 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-07-13 20:48:38,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:38,935 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-07-13 20:48:38,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-07-13 20:48:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:38,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:38,937 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:39,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:39,142 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-07-13 20:48:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:39,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885720298] [2021-07-13 20:48:39,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:39,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885720298] [2021-07-13 20:48:39,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885720298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684174062] [2021-07-13 20:48:39,282 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:48:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:39,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:39,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:39,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:39,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:39,419 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 19 treesize of output 19 [2021-07-13 20:48:39,421 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:39,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:39,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:39,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:48:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:39,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684174062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:39,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:39,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 20:48:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27865519] [2021-07-13 20:48:39,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:39,462 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:39,761 INFO L93 Difference]: Finished difference Result 2137 states and 7136 transitions. [2021-07-13 20:48:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:48:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:39,765 INFO L225 Difference]: With dead ends: 2137 [2021-07-13 20:48:39,765 INFO L226 Difference]: Without dead ends: 2122 [2021-07-13 20:48:39,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:48:39,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-07-13 20:48:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1626. [2021-07-13 20:48:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-07-13 20:48:39,795 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-07-13 20:48:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:39,795 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-07-13 20:48:39,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:39,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-07-13 20:48:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:39,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:39,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:39,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:39,998 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-07-13 20:48:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185823148] [2021-07-13 20:48:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:40,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185823148] [2021-07-13 20:48:40,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185823148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:40,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261688632] [2021-07-13 20:48:40,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:40,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:40,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:40,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:40,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:40,276 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 21 treesize of output 11 [2021-07-13 20:48:40,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:40,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:40,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:40,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:40,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261688632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:40,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:40,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:48:40,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864867457] [2021-07-13 20:48:40,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:40,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:40,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:40,299 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:40,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:40,556 INFO L93 Difference]: Finished difference Result 2071 states and 6841 transitions. [2021-07-13 20:48:40,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:48:40,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:40,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:40,560 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 20:48:40,560 INFO L226 Difference]: Without dead ends: 2045 [2021-07-13 20:48:40,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:48:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-07-13 20:48:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1620. [2021-07-13 20:48:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4033353922174183) internal successors, (5510), 1619 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5510 transitions. [2021-07-13 20:48:40,582 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5510 transitions. Word has length 26 [2021-07-13 20:48:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:40,582 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5510 transitions. [2021-07-13 20:48:40,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5510 transitions. [2021-07-13 20:48:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:40,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:40,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:40,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:40,785 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash 469684583, now seen corresponding path program 56 times [2021-07-13 20:48:40,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:40,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919479126] [2021-07-13 20:48:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:41,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:41,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919479126] [2021-07-13 20:48:41,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919479126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:41,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379026582] [2021-07-13 20:48:41,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:41,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:41,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:41,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:41,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:41,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:41,190 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 21 treesize of output 11 [2021-07-13 20:48:41,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:41,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:41,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:41,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379026582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:41,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:41,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:48:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810909491] [2021-07-13 20:48:41,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:41,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:41,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:41,212 INFO L87 Difference]: Start difference. First operand 1620 states and 5510 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:41,767 INFO L93 Difference]: Finished difference Result 2277 states and 7481 transitions. [2021-07-13 20:48:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:48:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:41,771 INFO L225 Difference]: With dead ends: 2277 [2021-07-13 20:48:41,771 INFO L226 Difference]: Without dead ends: 2262 [2021-07-13 20:48:41,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 655.6ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:48:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-07-13 20:48:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1610. [2021-07-13 20:48:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.403977625854568) internal successors, (5477), 1609 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5477 transitions. [2021-07-13 20:48:41,795 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5477 transitions. Word has length 26 [2021-07-13 20:48:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:41,795 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5477 transitions. [2021-07-13 20:48:41,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5477 transitions. [2021-07-13 20:48:41,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:41,797 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:41,797 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:41,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-13 20:48:41,997 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 57 times [2021-07-13 20:48:41,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:41,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330296307] [2021-07-13 20:48:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:42,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:42,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:42,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330296307] [2021-07-13 20:48:42,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330296307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:42,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053596340] [2021-07-13 20:48:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:42,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:42,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:42,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:42,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:42,334 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-07-13 20:48:42,334 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 72 treesize of output 50 [2021-07-13 20:48:42,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:42,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:42,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:42,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-07-13 20:48:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:42,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053596340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:42,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:42,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:42,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066609978] [2021-07-13 20:48:42,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:48:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:42,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:48:42,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:48:42,357 INFO L87 Difference]: Start difference. First operand 1610 states and 5477 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) [2021-07-13 20:48:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:43,115 INFO L93 Difference]: Finished difference Result 2271 states and 7307 transitions. [2021-07-13 20:48:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:48:43,119 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 26 [2021-07-13 20:48:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:43,124 INFO L225 Difference]: With dead ends: 2271 [2021-07-13 20:48:43,124 INFO L226 Difference]: Without dead ends: 2241 [2021-07-13 20:48:43,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:43,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-07-13 20:48:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1631. [2021-07-13 20:48:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:43,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-07-13 20:48:43,147 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-07-13 20:48:43,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:43,147 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-07-13 20:48:43,148 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) [2021-07-13 20:48:43,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-07-13 20:48:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:43,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:43,150 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:43,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 20:48:43,351 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1778959663, now seen corresponding path program 58 times [2021-07-13 20:48:43,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:43,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370028007] [2021-07-13 20:48:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:43,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:43,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370028007] [2021-07-13 20:48:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370028007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:43,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077517860] [2021-07-13 20:48:43,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:43,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:43,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-13 20:48:43,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:43,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:43,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:43,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:48:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077517860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:48:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467468021] [2021-07-13 20:48:43,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:43,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:43,599 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-07-13 20:48:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:43,984 INFO L93 Difference]: Finished difference Result 2135 states and 7023 transitions. [2021-07-13 20:48:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:48:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 26 [2021-07-13 20:48:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:43,988 INFO L225 Difference]: With dead ends: 2135 [2021-07-13 20:48:43,988 INFO L226 Difference]: Without dead ends: 2113 [2021-07-13 20:48:43,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:48:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-07-13 20:48:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1631. [2021-07-13 20:48:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-07-13 20:48:44,011 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-07-13 20:48:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:44,011 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-07-13 20:48:44,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-07-13 20:48:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-07-13 20:48:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:44,013 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:44,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:44,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-13 20:48:44,215 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 59 times [2021-07-13 20:48:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:44,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213029478] [2021-07-13 20:48:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:44,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:44,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213029478] [2021-07-13 20:48:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213029478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:44,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748233626] [2021-07-13 20:48:44,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:44,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:44,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:44,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:44,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-13 20:48:44,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:44,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:44,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:48:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748233626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:44,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:44,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:48:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749477172] [2021-07-13 20:48:44,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:44,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:44,493 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:44,866 INFO L93 Difference]: Finished difference Result 2023 states and 6745 transitions. [2021-07-13 20:48:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:48:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:44,870 INFO L225 Difference]: With dead ends: 2023 [2021-07-13 20:48:44,870 INFO L226 Difference]: Without dead ends: 1992 [2021-07-13 20:48:44,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:48:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-07-13 20:48:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1637. [2021-07-13 20:48:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-07-13 20:48:44,893 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-07-13 20:48:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:44,894 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-07-13 20:48:44,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-07-13 20:48:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:44,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:44,896 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:45,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:45,112 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 60 times [2021-07-13 20:48:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:45,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091113396] [2021-07-13 20:48:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:45,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:45,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091113396] [2021-07-13 20:48:45,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091113396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:45,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913294793] [2021-07-13 20:48:45,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:45,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:45,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:45,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-07-13 20:48:45,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:45,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:45,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:45,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-13 20:48:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:45,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913294793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:45,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:45,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-07-13 20:48:45,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447223541] [2021-07-13 20:48:45,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:45,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:45,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:45,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:45,352 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:45,703 INFO L93 Difference]: Finished difference Result 2057 states and 6834 transitions. [2021-07-13 20:48:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:48:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:45,706 INFO L225 Difference]: With dead ends: 2057 [2021-07-13 20:48:45,706 INFO L226 Difference]: Without dead ends: 2042 [2021-07-13 20:48:45,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:48:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-07-13 20:48:45,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1637. [2021-07-13 20:48:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-07-13 20:48:45,729 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-07-13 20:48:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:45,729 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-07-13 20:48:45,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-07-13 20:48:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:45,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:45,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:45,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-07-13 20:48:45,933 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-07-13 20:48:45,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:45,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693581347] [2021-07-13 20:48:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:46,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693581347] [2021-07-13 20:48:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693581347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:46,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724646360] [2021-07-13 20:48:46,093 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:46,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:46,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:46,228 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 19 treesize of output 19 [2021-07-13 20:48:46,229 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:46,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:46,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:46,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:48:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:46,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724646360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:46,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:46,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:48:46,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024460589] [2021-07-13 20:48:46,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:46,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:46,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:46,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:46,266 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:47,416 INFO L93 Difference]: Finished difference Result 2310 states and 7570 transitions. [2021-07-13 20:48:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:48:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:47,421 INFO L225 Difference]: With dead ends: 2310 [2021-07-13 20:48:47,421 INFO L226 Difference]: Without dead ends: 2295 [2021-07-13 20:48:47,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:48:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-07-13 20:48:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1638. [2021-07-13 20:48:47,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.392791692119731) internal successors, (5554), 1637 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5554 transitions. [2021-07-13 20:48:47,446 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5554 transitions. Word has length 26 [2021-07-13 20:48:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:47,446 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5554 transitions. [2021-07-13 20:48:47,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5554 transitions. [2021-07-13 20:48:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:47,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:47,448 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:47,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-13 20:48:47,649 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash -659260211, now seen corresponding path program 61 times [2021-07-13 20:48:47,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:47,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248932323] [2021-07-13 20:48:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:47,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:47,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248932323] [2021-07-13 20:48:47,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248932323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:47,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821602638] [2021-07-13 20:48:47,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:47,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:47,906 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 21 treesize of output 11 [2021-07-13 20:48:47,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:47,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:47,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:47,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:47,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821602638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:47,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:47,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:48:47,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435453846] [2021-07-13 20:48:47,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:47,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:47,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:47,927 INFO L87 Difference]: Start difference. First operand 1638 states and 5554 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:48,639 INFO L93 Difference]: Finished difference Result 2717 states and 8732 transitions. [2021-07-13 20:48:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:48:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:48,644 INFO L225 Difference]: With dead ends: 2717 [2021-07-13 20:48:48,644 INFO L226 Difference]: Without dead ends: 2695 [2021-07-13 20:48:48,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:48:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-07-13 20:48:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1680. [2021-07-13 20:48:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.4032162001191186) internal successors, (5714), 1679 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5714 transitions. [2021-07-13 20:48:48,673 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5714 transitions. Word has length 26 [2021-07-13 20:48:48,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:48,673 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5714 transitions. [2021-07-13 20:48:48,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5714 transitions. [2021-07-13 20:48:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:48,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:48,675 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:48,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:48,876 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-07-13 20:48:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:48,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475053269] [2021-07-13 20:48:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:48,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475053269] [2021-07-13 20:48:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475053269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142256589] [2021-07-13 20:48:48,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:49,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:48:49,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:49,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:49,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:49,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:49,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-07-13 20:48:49,130 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:48:49,141 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-07-13 20:48:49,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:49,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-13 20:48:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142256589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:49,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:49,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:48:49,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899800780] [2021-07-13 20:48:49,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:49,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:49,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:49,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:49,180 INFO L87 Difference]: Start difference. First operand 1680 states and 5714 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:50,405 INFO L93 Difference]: Finished difference Result 3323 states and 10531 transitions. [2021-07-13 20:48:50,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:48:50,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:50,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:50,412 INFO L225 Difference]: With dead ends: 3323 [2021-07-13 20:48:50,412 INFO L226 Difference]: Without dead ends: 3279 [2021-07-13 20:48:50,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:48:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-07-13 20:48:50,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1708. [2021-07-13 20:48:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.4106619800820153) internal successors, (5822), 1707 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5822 transitions. [2021-07-13 20:48:50,444 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5822 transitions. Word has length 26 [2021-07-13 20:48:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:50,444 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5822 transitions. [2021-07-13 20:48:50,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5822 transitions. [2021-07-13 20:48:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:50,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:50,447 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:50,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:50,647 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-07-13 20:48:50,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:50,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255981851] [2021-07-13 20:48:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:50,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255981851] [2021-07-13 20:48:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255981851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:50,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376918189] [2021-07-13 20:48:50,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:50,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:50,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:50,975 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 [2021-07-13 20:48:50,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:51,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:51,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:48:51,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:150 [2021-07-13 20:48:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376918189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:51,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:51,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:48:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457435226] [2021-07-13 20:48:51,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:51,159 INFO L87 Difference]: Start difference. First operand 1708 states and 5822 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:52,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:52,832 INFO L93 Difference]: Finished difference Result 2381 states and 7796 transitions. [2021-07-13 20:48:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:48:52,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:48:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:52,836 INFO L225 Difference]: With dead ends: 2381 [2021-07-13 20:48:52,836 INFO L226 Difference]: Without dead ends: 2366 [2021-07-13 20:48:52,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1238.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:48:52,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-07-13 20:48:52,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1721. [2021-07-13 20:48:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.4069767441860463) internal successors, (5860), 1720 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5860 transitions. [2021-07-13 20:48:52,859 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5860 transitions. Word has length 26 [2021-07-13 20:48:52,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:52,860 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5860 transitions. [2021-07-13 20:48:52,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:48:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5860 transitions. [2021-07-13 20:48:52,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:52,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:52,862 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:53,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-07-13 20:48:53,063 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:53,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-07-13 20:48:53,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:53,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616516722] [2021-07-13 20:48:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:53,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:53,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616516722] [2021-07-13 20:48:53,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616516722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845412230] [2021-07-13 20:48:53,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:53,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:53,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:53,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:53,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-07-13 20:48:53,300 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:48:53,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:53,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:53,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:48:53,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845412230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:53,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:53,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:48:53,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869271994] [2021-07-13 20:48:53,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:53,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:53,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:53,343 INFO L87 Difference]: Start difference. First operand 1721 states and 5860 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:54,068 INFO L93 Difference]: Finished difference Result 2557 states and 8457 transitions. [2021-07-13 20:48:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:48:54,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:54,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:54,072 INFO L225 Difference]: With dead ends: 2557 [2021-07-13 20:48:54,072 INFO L226 Difference]: Without dead ends: 2542 [2021-07-13 20:48:54,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:48:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-07-13 20:48:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1724. [2021-07-13 20:48:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.4062681369704007) internal successors, (5869), 1723 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:54,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5869 transitions. [2021-07-13 20:48:54,097 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5869 transitions. Word has length 26 [2021-07-13 20:48:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:54,097 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5869 transitions. [2021-07-13 20:48:54,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5869 transitions. [2021-07-13 20:48:54,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:54,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:54,100 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:54,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:54,300 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:54,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:54,300 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-07-13 20:48:54,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:54,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495070987] [2021-07-13 20:48:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:54,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495070987] [2021-07-13 20:48:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495070987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:54,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508336540] [2021-07-13 20:48:54,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:54,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:54,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:48:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:54,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:54,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:54,568 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 [2021-07-13 20:48:54,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:54,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:54,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:48:54,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-07-13 20:48:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508336540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:54,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:54,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-07-13 20:48:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722501801] [2021-07-13 20:48:54,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:48:54,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:54,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:48:54,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:48:54,672 INFO L87 Difference]: Start difference. First operand 1724 states and 5869 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:55,331 INFO L93 Difference]: Finished difference Result 2476 states and 8179 transitions. [2021-07-13 20:48:55,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:48:55,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:55,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:55,336 INFO L225 Difference]: With dead ends: 2476 [2021-07-13 20:48:55,336 INFO L226 Difference]: Without dead ends: 2451 [2021-07-13 20:48:55,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:48:55,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-07-13 20:48:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1710. [2021-07-13 20:48:55,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.4119368051492103) internal successors, (5831), 1709 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5831 transitions. [2021-07-13 20:48:55,360 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5831 transitions. Word has length 26 [2021-07-13 20:48:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:55,360 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5831 transitions. [2021-07-13 20:48:55,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5831 transitions. [2021-07-13 20:48:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:55,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:55,363 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:55,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-07-13 20:48:55,563 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:55,564 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-07-13 20:48:55,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:55,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928558108] [2021-07-13 20:48:55,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:55,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:55,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928558108] [2021-07-13 20:48:55,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928558108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:55,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001965712] [2021-07-13 20:48:55,672 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:55,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:48:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:55,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:48:55,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:55,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:55,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:55,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:55,823 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 21 treesize of output 11 [2021-07-13 20:48:55,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:55,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:55,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:55,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001965712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:55,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:55,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:48:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437366817] [2021-07-13 20:48:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:48:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:48:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:48:55,841 INFO L87 Difference]: Start difference. First operand 1710 states and 5831 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:56,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:56,595 INFO L93 Difference]: Finished difference Result 2583 states and 8404 transitions. [2021-07-13 20:48:56,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:48:56,595 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:48:56,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:56,600 INFO L225 Difference]: With dead ends: 2583 [2021-07-13 20:48:56,600 INFO L226 Difference]: Without dead ends: 2553 [2021-07-13 20:48:56,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-13 20:48:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1766. [2021-07-13 20:48:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.405665722379603) internal successors, (6011), 1765 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6011 transitions. [2021-07-13 20:48:56,628 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6011 transitions. Word has length 26 [2021-07-13 20:48:56,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:56,628 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 6011 transitions. [2021-07-13 20:48:56,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:56,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6011 transitions. [2021-07-13 20:48:56,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:56,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:56,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:56,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:56,831 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-07-13 20:48:56,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:56,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556902395] [2021-07-13 20:48:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:56,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:56,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556902395] [2021-07-13 20:48:56,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556902395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:56,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23219686] [2021-07-13 20:48:56,946 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:56,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:48:56,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:56,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:57,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:57,114 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 21 treesize of output 11 [2021-07-13 20:48:57,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:57,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:57,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:57,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:57,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23219686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:57,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:57,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:48:57,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141944648] [2021-07-13 20:48:57,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:57,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:57,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:57,136 INFO L87 Difference]: Start difference. First operand 1766 states and 6011 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-07-13 20:48:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:58,050 INFO L93 Difference]: Finished difference Result 2816 states and 9179 transitions. [2021-07-13 20:48:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:48:58,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-07-13 20:48:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:58,055 INFO L225 Difference]: With dead ends: 2816 [2021-07-13 20:48:58,055 INFO L226 Difference]: Without dead ends: 2794 [2021-07-13 20:48:58,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 777.3ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:48:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-07-13 20:48:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1780. [2021-07-13 20:48:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 3.3991006183249017) internal successors, (6047), 1779 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6047 transitions. [2021-07-13 20:48:58,093 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6047 transitions. Word has length 26 [2021-07-13 20:48:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:58,093 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 6047 transitions. [2021-07-13 20:48:58,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-07-13 20:48:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6047 transitions. [2021-07-13 20:48:58,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:58,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:58,096 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-07-13 20:48:58,301 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-07-13 20:48:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840268074] [2021-07-13 20:48:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:58,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840268074] [2021-07-13 20:48:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840268074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855176113] [2021-07-13 20:48:58,430 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:58,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:48:58,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:48:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:58,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:58,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:48:58,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:48:58,588 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 21 treesize of output 11 [2021-07-13 20:48:58,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:48:58,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:58,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:58,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:48:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855176113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:58,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:48:58,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:48:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397064074] [2021-07-13 20:48:58,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:48:58,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:48:58,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:48:58,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:48:58,611 INFO L87 Difference]: Start difference. First operand 1780 states and 6047 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-07-13 20:48:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:48:59,377 INFO L93 Difference]: Finished difference Result 2668 states and 8760 transitions. [2021-07-13 20:48:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:48:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-07-13 20:48:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:48:59,382 INFO L225 Difference]: With dead ends: 2668 [2021-07-13 20:48:59,382 INFO L226 Difference]: Without dead ends: 2649 [2021-07-13 20:48:59,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:48:59,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-07-13 20:48:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 1789. [2021-07-13 20:48:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.402684563758389) internal successors, (6084), 1788 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:48:59,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6084 transitions. [2021-07-13 20:48:59,410 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6084 transitions. Word has length 26 [2021-07-13 20:48:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:48:59,410 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6084 transitions. [2021-07-13 20:48:59,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-07-13 20:48:59,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6084 transitions. [2021-07-13 20:48:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:48:59,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:48:59,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:48:59,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:59,614 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:48:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:48:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-07-13 20:48:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:48:59,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217401542] [2021-07-13 20:48:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:48:59,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:48:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:48:59,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:48:59,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217401542] [2021-07-13 20:48:59,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217401542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:48:59,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973270016] [2021-07-13 20:48:59,746 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:48:59,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:48:59,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:48:59,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:48:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:48:59,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:59,900 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 [2021-07-13 20:48:59,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:48:59,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:48:59,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:48:59,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:75 [2021-07-13 20:49:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:00,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973270016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:00,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:00,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-07-13 20:49:00,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333507392] [2021-07-13 20:49:00,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:00,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:00,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:00,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:00,010 INFO L87 Difference]: Start difference. First operand 1789 states and 6084 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:49:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:01,212 INFO L93 Difference]: Finished difference Result 2769 states and 9024 transitions. [2021-07-13 20:49:01,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:49:01,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:49:01,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:01,218 INFO L225 Difference]: With dead ends: 2769 [2021-07-13 20:49:01,218 INFO L226 Difference]: Without dead ends: 2754 [2021-07-13 20:49:01,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:49:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-07-13 20:49:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1789. [2021-07-13 20:49:01,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.3982102908277403) internal successors, (6076), 1788 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6076 transitions. [2021-07-13 20:49:01,248 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6076 transitions. Word has length 26 [2021-07-13 20:49:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:01,249 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6076 transitions. [2021-07-13 20:49:01,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:49:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6076 transitions. [2021-07-13 20:49:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:01,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:01,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:01,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,452 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-07-13 20:49:01,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:01,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98095521] [2021-07-13 20:49:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:01,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:01,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98095521] [2021-07-13 20:49:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98095521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095996207] [2021-07-13 20:49:01,588 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:49:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:01,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:01,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:01,743 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 19 treesize of output 19 [2021-07-13 20:49:01,744 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:49:01,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:01,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:01,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:49:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:01,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095996207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:01,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:01,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:49:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046793445] [2021-07-13 20:49:01,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:01,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:01,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:01,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:01,803 INFO L87 Difference]: Start difference. First operand 1789 states and 6076 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:02,345 INFO L93 Difference]: Finished difference Result 2442 states and 8101 transitions. [2021-07-13 20:49:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:49:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:49:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:02,349 INFO L225 Difference]: With dead ends: 2442 [2021-07-13 20:49:02,349 INFO L226 Difference]: Without dead ends: 2417 [2021-07-13 20:49:02,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:49:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-13 20:49:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1783. [2021-07-13 20:49:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.3956228956228958) internal successors, (6051), 1782 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6051 transitions. [2021-07-13 20:49:02,373 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6051 transitions. Word has length 26 [2021-07-13 20:49:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:02,373 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6051 transitions. [2021-07-13 20:49:02,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6051 transitions. [2021-07-13 20:49:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:02,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:02,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:02,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,576 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:02,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:02,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-07-13 20:49:02,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:02,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788345306] [2021-07-13 20:49:02,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:02,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788345306] [2021-07-13 20:49:02,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788345306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466217975] [2021-07-13 20:49:02,710 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:02,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:02,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:02,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:49:02,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:02,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:02,848 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 19 treesize of output 19 [2021-07-13 20:49:02,849 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:49:02,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:02,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:02,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-07-13 20:49:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466217975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:02,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:02,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:49:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160967475] [2021-07-13 20:49:02,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:02,896 INFO L87 Difference]: Start difference. First operand 1783 states and 6051 transitions. Second operand has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:49:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:03,717 INFO L93 Difference]: Finished difference Result 2378 states and 7896 transitions. [2021-07-13 20:49:03,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:49:03,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) 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 26 [2021-07-13 20:49:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:03,722 INFO L225 Difference]: With dead ends: 2378 [2021-07-13 20:49:03,722 INFO L226 Difference]: Without dead ends: 2363 [2021-07-13 20:49:03,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:49:03,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-07-13 20:49:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1772. [2021-07-13 20:49:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.399209486166008) internal successors, (6020), 1771 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6020 transitions. [2021-07-13 20:49:03,748 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6020 transitions. Word has length 26 [2021-07-13 20:49:03,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:03,748 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 6020 transitions. [2021-07-13 20:49:03,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) 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) [2021-07-13 20:49:03,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6020 transitions. [2021-07-13 20:49:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:03,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:03,751 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:03,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:03,951 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-07-13 20:49:03,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:03,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899038623] [2021-07-13 20:49:03,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:04,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899038623] [2021-07-13 20:49:04,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899038623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138580178] [2021-07-13 20:49:04,101 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:04,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:49:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:04,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:04,254 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 [2021-07-13 20:49:04,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:49:04,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:04,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:49:04,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-07-13 20:49:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:04,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138580178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:04,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:04,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-13 20:49:04,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433251372] [2021-07-13 20:49:04,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:04,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:04,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:04,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:04,347 INFO L87 Difference]: Start difference. First operand 1772 states and 6020 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:04,801 INFO L93 Difference]: Finished difference Result 2374 states and 7919 transitions. [2021-07-13 20:49:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:49:04,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:49:04,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:04,805 INFO L225 Difference]: With dead ends: 2374 [2021-07-13 20:49:04,805 INFO L226 Difference]: Without dead ends: 2359 [2021-07-13 20:49:04,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:49:04,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-07-13 20:49:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1783. [2021-07-13 20:49:04,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4079685746352415) internal successors, (6073), 1782 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6073 transitions. [2021-07-13 20:49:04,832 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6073 transitions. Word has length 26 [2021-07-13 20:49:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:04,833 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6073 transitions. [2021-07-13 20:49:04,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6073 transitions. [2021-07-13 20:49:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:04,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:04,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:05,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:05,036 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:05,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1092882871, now seen corresponding path program 66 times [2021-07-13 20:49:05,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:05,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093011932] [2021-07-13 20:49:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:05,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093011932] [2021-07-13 20:49:05,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093011932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244168787] [2021-07-13 20:49:05,174 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:05,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:49:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 20:49:05,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:05,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:05,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:05,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:05,335 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 21 treesize of output 11 [2021-07-13 20:49:05,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:05,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:05,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:05,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:49:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:05,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244168787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:05,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:05,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-07-13 20:49:05,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504653469] [2021-07-13 20:49:05,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:49:05,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:05,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:49:05,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:49:05,355 INFO L87 Difference]: Start difference. First operand 1783 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:06,473 INFO L93 Difference]: Finished difference Result 2367 states and 7833 transitions. [2021-07-13 20:49:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:49:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:49:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:06,478 INFO L225 Difference]: With dead ends: 2367 [2021-07-13 20:49:06,478 INFO L226 Difference]: Without dead ends: 2345 [2021-07-13 20:49:06,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 893.4ms TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:49:06,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-07-13 20:49:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1774. [2021-07-13 20:49:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.412859560067682) internal successors, (6051), 1773 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6051 transitions. [2021-07-13 20:49:06,503 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6051 transitions. Word has length 26 [2021-07-13 20:49:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:06,503 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 6051 transitions. [2021-07-13 20:49:06,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6051 transitions. [2021-07-13 20:49:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:06,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:06,506 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:06,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:06,706 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -167389005, now seen corresponding path program 67 times [2021-07-13 20:49:06,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:06,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344406715] [2021-07-13 20:49:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:06,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344406715] [2021-07-13 20:49:06,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344406715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664031181] [2021-07-13 20:49:06,855 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:06,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 20:49:06,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:06,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:06,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:06,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:49:06,998 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 21 treesize of output 11 [2021-07-13 20:49:06,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:49:07,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:07,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:07,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-07-13 20:49:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:07,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664031181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:07,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:07,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-07-13 20:49:07,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772287104] [2021-07-13 20:49:07,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:07,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:07,021 INFO L87 Difference]: Start difference. First operand 1774 states and 6051 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:07,801 INFO L93 Difference]: Finished difference Result 2445 states and 8079 transitions. [2021-07-13 20:49:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:49:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:49:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:07,806 INFO L225 Difference]: With dead ends: 2445 [2021-07-13 20:49:07,806 INFO L226 Difference]: Without dead ends: 2426 [2021-07-13 20:49:07,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 686.4ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:49:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-07-13 20:49:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1768. [2021-07-13 20:49:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.411431805319751) internal successors, (6028), 1767 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6028 transitions. [2021-07-13 20:49:07,832 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6028 transitions. Word has length 26 [2021-07-13 20:49:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:07,832 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 6028 transitions. [2021-07-13 20:49:07,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6028 transitions. [2021-07-13 20:49:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:07,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:07,835 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:08,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable361 [2021-07-13 20:49:08,038 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:08,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 68 times [2021-07-13 20:49:08,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:08,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334794273] [2021-07-13 20:49:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:08,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334794273] [2021-07-13 20:49:08,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334794273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802428207] [2021-07-13 20:49:08,172 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:08,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:49:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:08,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:08,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-13 20:49:08,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:49:08,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:08,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:08,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:49:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:08,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802428207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:08,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:08,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-07-13 20:49:08,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100185566] [2021-07-13 20:49:08,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 20:49:08,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:08,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 20:49:08,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:08,378 INFO L87 Difference]: Start difference. First operand 1768 states and 6028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-07-13 20:49:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:09,204 INFO L93 Difference]: Finished difference Result 2420 states and 8056 transitions. [2021-07-13 20:49:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 20:49:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-07-13 20:49:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:09,208 INFO L225 Difference]: With dead ends: 2420 [2021-07-13 20:49:09,208 INFO L226 Difference]: Without dead ends: 2405 [2021-07-13 20:49:09,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 639.8ms TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:49:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-13 20:49:09,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1770. [2021-07-13 20:49:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4132278123233464) internal successors, (6038), 1769 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6038 transitions. [2021-07-13 20:49:09,233 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6038 transitions. Word has length 26 [2021-07-13 20:49:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:09,233 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 6038 transitions. [2021-07-13 20:49:09,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-07-13 20:49:09,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6038 transitions. [2021-07-13 20:49:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 20:49:09,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:09,236 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:09,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:09,437 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:09,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:09,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1755833907, now seen corresponding path program 69 times [2021-07-13 20:49:09,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:09,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688031726] [2021-07-13 20:49:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:09,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:09,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688031726] [2021-07-13 20:49:09,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688031726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:09,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640223521] [2021-07-13 20:49:09,543 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:09,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:09,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:09,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 20:49:09,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:09,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:09,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:49:09,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:49:09,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 39 [2021-07-13 20:49:09,669 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:49:09,683 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-07-13 20:49:09,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:49:09,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-07-13 20:49:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640223521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:09,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:09,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:49:09,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635270237] [2021-07-13 20:49:09,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:09,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:09,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:09,729 INFO L87 Difference]: Start difference. First operand 1770 states and 6038 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:10,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:10,308 INFO L93 Difference]: Finished difference Result 2553 states and 8437 transitions. [2021-07-13 20:49:10,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:49:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 20:49:10,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:10,313 INFO L225 Difference]: With dead ends: 2553 [2021-07-13 20:49:10,313 INFO L226 Difference]: Without dead ends: 2523 [2021-07-13 20:49:10,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:49:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-07-13 20:49:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1776. [2021-07-13 20:49:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.411830985915493) internal successors, (6056), 1775 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 6056 transitions. [2021-07-13 20:49:10,340 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 6056 transitions. Word has length 26 [2021-07-13 20:49:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:10,340 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 6056 transitions. [2021-07-13 20:49:10,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 6056 transitions. [2021-07-13 20:49:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:10,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:10,343 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:10,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:10,544 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-07-13 20:49:10,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:10,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261563886] [2021-07-13 20:49:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:10,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:10,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261563886] [2021-07-13 20:49:10,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261563886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138347899] [2021-07-13 20:49:10,583 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:10,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:10,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:10,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:10,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:10,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138347899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:10,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:10,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:10,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619312632] [2021-07-13 20:49:10,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:10,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:10,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:10,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:10,696 INFO L87 Difference]: Start difference. First operand 1776 states and 6056 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:11,490 INFO L93 Difference]: Finished difference Result 4749 states and 14648 transitions. [2021-07-13 20:49:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:49:11,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-07-13 20:49:11,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:11,499 INFO L225 Difference]: With dead ends: 4749 [2021-07-13 20:49:11,499 INFO L226 Difference]: Without dead ends: 4749 [2021-07-13 20:49:11,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:49:11,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2021-07-13 20:49:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 1969. [2021-07-13 20:49:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.4690040650406506) internal successors, (6827), 1968 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6827 transitions. [2021-07-13 20:49:11,541 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6827 transitions. Word has length 28 [2021-07-13 20:49:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6827 transitions. [2021-07-13 20:49:11,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6827 transitions. [2021-07-13 20:49:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:11,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:11,544 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:11,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:11,744 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:11,744 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-07-13 20:49:11,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:11,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786834673] [2021-07-13 20:49:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:11,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786834673] [2021-07-13 20:49:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786834673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:11,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793854191] [2021-07-13 20:49:11,782 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:11,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:11,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:11,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:11,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793854191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:11,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:11,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:49:11,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272969633] [2021-07-13 20:49:11,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:11,908 INFO L87 Difference]: Start difference. First operand 1969 states and 6827 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:13,009 INFO L93 Difference]: Finished difference Result 6328 states and 19229 transitions. [2021-07-13 20:49:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:49:13,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:13,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:13,021 INFO L225 Difference]: With dead ends: 6328 [2021-07-13 20:49:13,021 INFO L226 Difference]: Without dead ends: 6328 [2021-07-13 20:49:13,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:49:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-07-13 20:49:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 1980. [2021-07-13 20:49:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.477008590197069) internal successors, (6881), 1979 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6881 transitions. [2021-07-13 20:49:13,081 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6881 transitions. Word has length 28 [2021-07-13 20:49:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:13,081 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6881 transitions. [2021-07-13 20:49:13,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6881 transitions. [2021-07-13 20:49:13,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:13,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:13,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:13,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:13,285 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:13,285 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-07-13 20:49:13,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:13,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499445098] [2021-07-13 20:49:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:13,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:13,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499445098] [2021-07-13 20:49:13,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499445098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:13,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099146545] [2021-07-13 20:49:13,341 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:13,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:49:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:13,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099146545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:13,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:13,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:49:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849854437] [2021-07-13 20:49:13,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:13,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:13,482 INFO L87 Difference]: Start difference. First operand 1980 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:14,552 INFO L93 Difference]: Finished difference Result 5721 states and 17761 transitions. [2021-07-13 20:49:14,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:49:14,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:14,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:14,563 INFO L225 Difference]: With dead ends: 5721 [2021-07-13 20:49:14,564 INFO L226 Difference]: Without dead ends: 5721 [2021-07-13 20:49:14,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 665.1ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:49:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-07-13 20:49:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 1928. [2021-07-13 20:49:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.4504411001556825) internal successors, (6649), 1927 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6649 transitions. [2021-07-13 20:49:14,615 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6649 transitions. Word has length 28 [2021-07-13 20:49:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:14,615 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6649 transitions. [2021-07-13 20:49:14,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:14,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6649 transitions. [2021-07-13 20:49:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:14,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:14,618 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:14,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 20:49:14,819 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:14,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-07-13 20:49:14,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:14,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147400520] [2021-07-13 20:49:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:14,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147400520] [2021-07-13 20:49:14,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147400520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:14,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990533394] [2021-07-13 20:49:14,856 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:14,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990533394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:14,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:14,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:49:14,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733507101] [2021-07-13 20:49:14,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:14,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:14,964 INFO L87 Difference]: Start difference. First operand 1928 states and 6649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:15,873 INFO L93 Difference]: Finished difference Result 4835 states and 14815 transitions. [2021-07-13 20:49:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:49:15,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:15,882 INFO L225 Difference]: With dead ends: 4835 [2021-07-13 20:49:15,882 INFO L226 Difference]: Without dead ends: 4835 [2021-07-13 20:49:15,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:49:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-07-13 20:49:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1938. [2021-07-13 20:49:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4460505937016004) internal successors, (6675), 1937 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6675 transitions. [2021-07-13 20:49:15,927 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6675 transitions. Word has length 28 [2021-07-13 20:49:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:15,927 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 6675 transitions. [2021-07-13 20:49:15,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6675 transitions. [2021-07-13 20:49:15,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:15,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:15,930 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:16,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 20:49:16,146 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 70 times [2021-07-13 20:49:16,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:16,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441247048] [2021-07-13 20:49:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:16,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:16,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441247048] [2021-07-13 20:49:16,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441247048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:16,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009668351] [2021-07-13 20:49:16,184 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:16,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:16,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009668351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:16,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:16,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:49:16,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901449758] [2021-07-13 20:49:16,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:16,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:16,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:16,287 INFO L87 Difference]: Start difference. First operand 1938 states and 6675 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:16,799 INFO L93 Difference]: Finished difference Result 4254 states and 13212 transitions. [2021-07-13 20:49:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:49:16,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:49:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:16,806 INFO L225 Difference]: With dead ends: 4254 [2021-07-13 20:49:16,806 INFO L226 Difference]: Without dead ends: 4254 [2021-07-13 20:49:16,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:49:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-07-13 20:49:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 1994. [2021-07-13 20:49:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.431008529854491) internal successors, (6838), 1993 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6838 transitions. [2021-07-13 20:49:16,853 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6838 transitions. Word has length 28 [2021-07-13 20:49:16,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:16,853 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6838 transitions. [2021-07-13 20:49:16,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6838 transitions. [2021-07-13 20:49:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:16,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:16,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:17,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:49:17,066 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:17,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:17,066 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-07-13 20:49:17,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:17,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474177080] [2021-07-13 20:49:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:17,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474177080] [2021-07-13 20:49:17,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474177080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940966804] [2021-07-13 20:49:17,092 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 [2021-07-13 20:49:17,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:17,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:17,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:17,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940966804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:17,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:49:17,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150677444] [2021-07-13 20:49:17,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:17,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:17,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:17,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:17,171 INFO L87 Difference]: Start difference. First operand 1994 states and 6838 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:17,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:17,327 INFO L93 Difference]: Finished difference Result 3480 states and 11300 transitions. [2021-07-13 20:49:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:49:17,327 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-07-13 20:49:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:17,333 INFO L225 Difference]: With dead ends: 3480 [2021-07-13 20:49:17,333 INFO L226 Difference]: Without dead ends: 3462 [2021-07-13 20:49:17,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-07-13 20:49:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2379. [2021-07-13 20:49:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.5025231286795626) internal successors, (8329), 2378 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8329 transitions. [2021-07-13 20:49:17,371 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8329 transitions. Word has length 28 [2021-07-13 20:49:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:17,371 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8329 transitions. [2021-07-13 20:49:17,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8329 transitions. [2021-07-13 20:49:17,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:17,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:17,374 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:17,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:17,575 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:17,575 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-07-13 20:49:17,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:17,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730214087] [2021-07-13 20:49:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730214087] [2021-07-13 20:49:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730214087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615622030] [2021-07-13 20:49:17,608 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 [2021-07-13 20:49:17,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:49:17,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:17,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:17,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615622030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:17,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:17,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:49:17,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508027240] [2021-07-13 20:49:17,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:17,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:17,732 INFO L87 Difference]: Start difference. First operand 2379 states and 8329 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:18,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:18,306 INFO L93 Difference]: Finished difference Result 4139 states and 13172 transitions. [2021-07-13 20:49:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:49:18,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:18,313 INFO L225 Difference]: With dead ends: 4139 [2021-07-13 20:49:18,314 INFO L226 Difference]: Without dead ends: 4092 [2021-07-13 20:49:18,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:49:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-07-13 20:49:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2547. [2021-07-13 20:49:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.52356637863315) internal successors, (8971), 2546 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8971 transitions. [2021-07-13 20:49:18,359 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8971 transitions. Word has length 28 [2021-07-13 20:49:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:18,359 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 8971 transitions. [2021-07-13 20:49:18,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8971 transitions. [2021-07-13 20:49:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:18,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:18,363 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-07-13 20:49:18,564 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 71 times [2021-07-13 20:49:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:18,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834798460] [2021-07-13 20:49:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:18,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834798460] [2021-07-13 20:49:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834798460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47984339] [2021-07-13 20:49:18,608 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:18,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:18,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:18,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47984339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:18,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:18,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 20:49:18,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247168838] [2021-07-13 20:49:18,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:49:18,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:49:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:49:18,727 INFO L87 Difference]: Start difference. First operand 2547 states and 8971 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:19,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:19,110 INFO L93 Difference]: Finished difference Result 4980 states and 16523 transitions. [2021-07-13 20:49:19,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:49:19,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:19,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:19,119 INFO L225 Difference]: With dead ends: 4980 [2021-07-13 20:49:19,119 INFO L226 Difference]: Without dead ends: 4893 [2021-07-13 20:49:19,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:49:19,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-07-13 20:49:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3198. [2021-07-13 20:49:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.5376915858617455) internal successors, (11310), 3197 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11310 transitions. [2021-07-13 20:49:19,183 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11310 transitions. Word has length 28 [2021-07-13 20:49:19,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:19,183 INFO L482 AbstractCegarLoop]: Abstraction has 3198 states and 11310 transitions. [2021-07-13 20:49:19,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:19,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11310 transitions. [2021-07-13 20:49:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:19,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:19,188 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:19,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-07-13 20:49:19,405 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-07-13 20:49:19,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:19,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757587473] [2021-07-13 20:49:19,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:19,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757587473] [2021-07-13 20:49:19,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757587473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:19,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833945356] [2021-07-13 20:49:19,435 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:19,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:19,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:19,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833945356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885911102] [2021-07-13 20:49:19,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:19,555 INFO L87 Difference]: Start difference. First operand 3198 states and 11310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:20,201 INFO L93 Difference]: Finished difference Result 5423 states and 17174 transitions. [2021-07-13 20:49:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:49:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:49:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:20,210 INFO L225 Difference]: With dead ends: 5423 [2021-07-13 20:49:20,210 INFO L226 Difference]: Without dead ends: 5397 [2021-07-13 20:49:20,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:49:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-07-13 20:49:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 3216. [2021-07-13 20:49:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5430793157076206) internal successors, (11391), 3215 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11391 transitions. [2021-07-13 20:49:20,271 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11391 transitions. Word has length 28 [2021-07-13 20:49:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:20,272 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11391 transitions. [2021-07-13 20:49:20,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11391 transitions. [2021-07-13 20:49:20,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:20,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:20,276 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:20,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:20,477 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:20,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-07-13 20:49:20,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:20,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858073840] [2021-07-13 20:49:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:20,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858073840] [2021-07-13 20:49:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858073840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472717527] [2021-07-13 20:49:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:20,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:20,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:20,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:20,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472717527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:20,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:20,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:20,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845637011] [2021-07-13 20:49:20,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:20,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:20,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:20,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:20,614 INFO L87 Difference]: Start difference. First operand 3216 states and 11391 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:21,214 INFO L93 Difference]: Finished difference Result 5478 states and 17366 transitions. [2021-07-13 20:49:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:49:21,214 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:49:21,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:21,224 INFO L225 Difference]: With dead ends: 5478 [2021-07-13 20:49:21,224 INFO L226 Difference]: Without dead ends: 5447 [2021-07-13 20:49:21,225 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:49:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-07-13 20:49:21,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3206. [2021-07-13 20:49:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.550390015600624) internal successors, (11379), 3205 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11379 transitions. [2021-07-13 20:49:21,296 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11379 transitions. Word has length 28 [2021-07-13 20:49:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:21,296 INFO L482 AbstractCegarLoop]: Abstraction has 3206 states and 11379 transitions. [2021-07-13 20:49:21,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:21,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11379 transitions. [2021-07-13 20:49:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:21,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:21,301 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:21,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:21,502 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-07-13 20:49:21,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:21,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072581260] [2021-07-13 20:49:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:21,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:21,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072581260] [2021-07-13 20:49:21,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072581260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:21,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522714755] [2021-07-13 20:49:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:21,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:49:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:21,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:21,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522714755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:21,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:21,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:21,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931334292] [2021-07-13 20:49:21,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:21,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:21,629 INFO L87 Difference]: Start difference. First operand 3206 states and 11379 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:22,169 INFO L93 Difference]: Finished difference Result 6636 states and 21425 transitions. [2021-07-13 20:49:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:49:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:49:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:22,182 INFO L225 Difference]: With dead ends: 6636 [2021-07-13 20:49:22,183 INFO L226 Difference]: Without dead ends: 6589 [2021-07-13 20:49:22,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:49:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-07-13 20:49:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 3369. [2021-07-13 20:49:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.5973871733966747) internal successors, (12116), 3368 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 12116 transitions. [2021-07-13 20:49:22,272 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 12116 transitions. Word has length 28 [2021-07-13 20:49:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:22,272 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 12116 transitions. [2021-07-13 20:49:22,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 12116 transitions. [2021-07-13 20:49:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:22,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:22,278 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:22,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:22,489 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-07-13 20:49:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:22,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465073398] [2021-07-13 20:49:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:22,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:22,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:22,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465073398] [2021-07-13 20:49:22,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465073398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897914776] [2021-07-13 20:49:22,511 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:22,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:22,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897914776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:22,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:22,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 20:49:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562104844] [2021-07-13 20:49:22,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:49:22,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:22,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:49:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:49:22,587 INFO L87 Difference]: Start difference. First operand 3369 states and 12116 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:22,738 INFO L93 Difference]: Finished difference Result 5034 states and 16661 transitions. [2021-07-13 20:49:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:49:22,738 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-07-13 20:49:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:22,747 INFO L225 Difference]: With dead ends: 5034 [2021-07-13 20:49:22,748 INFO L226 Difference]: Without dead ends: 5034 [2021-07-13 20:49:22,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:49:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-07-13 20:49:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3201. [2021-07-13 20:49:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.556875) internal successors, (11382), 3200 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11382 transitions. [2021-07-13 20:49:22,821 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11382 transitions. Word has length 28 [2021-07-13 20:49:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:22,821 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11382 transitions. [2021-07-13 20:49:22,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:22,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11382 transitions. [2021-07-13 20:49:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:22,825 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:22,825 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:23,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-13 20:49:23,026 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-07-13 20:49:23,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:23,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640637668] [2021-07-13 20:49:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:23,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640637668] [2021-07-13 20:49:23,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640637668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:23,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368605385] [2021-07-13 20:49:23,066 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:23,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:23,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:23,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:23,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368605385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:23,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:23,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:23,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207629811] [2021-07-13 20:49:23,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:23,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:23,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:23,160 INFO L87 Difference]: Start difference. First operand 3201 states and 11382 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:23,760 INFO L93 Difference]: Finished difference Result 7123 states and 22742 transitions. [2021-07-13 20:49:23,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:49:23,761 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:49:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:23,775 INFO L225 Difference]: With dead ends: 7123 [2021-07-13 20:49:23,776 INFO L226 Difference]: Without dead ends: 7123 [2021-07-13 20:49:23,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:49:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-07-13 20:49:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 3231. [2021-07-13 20:49:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.556346749226006) internal successors, (11487), 3230 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 11487 transitions. [2021-07-13 20:49:23,881 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 11487 transitions. Word has length 28 [2021-07-13 20:49:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:23,881 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 11487 transitions. [2021-07-13 20:49:23,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 11487 transitions. [2021-07-13 20:49:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:23,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:23,886 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:24,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 20:49:24,086 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:24,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-07-13 20:49:24,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:24,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664818404] [2021-07-13 20:49:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:24,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664818404] [2021-07-13 20:49:24,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664818404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008313758] [2021-07-13 20:49:24,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:24,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:24,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:24,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:24,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:24,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008313758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:24,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:24,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:24,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991368239] [2021-07-13 20:49:24,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:24,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:24,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:24,219 INFO L87 Difference]: Start difference. First operand 3231 states and 11487 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:24,889 INFO L93 Difference]: Finished difference Result 7417 states and 23715 transitions. [2021-07-13 20:49:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:49:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:49:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:24,904 INFO L225 Difference]: With dead ends: 7417 [2021-07-13 20:49:24,904 INFO L226 Difference]: Without dead ends: 7417 [2021-07-13 20:49:24,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:49:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-07-13 20:49:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 3361. [2021-07-13 20:49:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 3.5398809523809525) internal successors, (11894), 3360 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 11894 transitions. [2021-07-13 20:49:25,007 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 11894 transitions. Word has length 28 [2021-07-13 20:49:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:25,007 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 11894 transitions. [2021-07-13 20:49:25,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 11894 transitions. [2021-07-13 20:49:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:25,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:25,013 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:25,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-07-13 20:49:25,213 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-07-13 20:49:25,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:25,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202256625] [2021-07-13 20:49:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:25,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:25,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202256625] [2021-07-13 20:49:25,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202256625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:25,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106808071] [2021-07-13 20:49:25,243 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:25,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:25,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:25,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:25,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:25,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106808071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:25,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:25,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391012912] [2021-07-13 20:49:25,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:25,328 INFO L87 Difference]: Start difference. First operand 3361 states and 11894 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:25,861 INFO L93 Difference]: Finished difference Result 7892 states and 25256 transitions. [2021-07-13 20:49:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:49:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:49:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:25,877 INFO L225 Difference]: With dead ends: 7892 [2021-07-13 20:49:25,877 INFO L226 Difference]: Without dead ends: 7879 [2021-07-13 20:49:25,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:49:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-07-13 20:49:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 4006. [2021-07-13 20:49:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 3.5845193508114854) internal successors, (14356), 4005 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 14356 transitions. [2021-07-13 20:49:25,994 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 14356 transitions. Word has length 28 [2021-07-13 20:49:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:25,994 INFO L482 AbstractCegarLoop]: Abstraction has 4006 states and 14356 transitions. [2021-07-13 20:49:25,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 14356 transitions. [2021-07-13 20:49:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:26,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:26,001 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:26,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-13 20:49:26,201 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-07-13 20:49:26,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:26,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006595933] [2021-07-13 20:49:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:26,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:26,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006595933] [2021-07-13 20:49:26,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006595933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:26,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468289229] [2021-07-13 20:49:26,232 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:26,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:49:26,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:26,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468289229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:26,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:26,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150905601] [2021-07-13 20:49:26,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:26,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:26,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:26,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:26,325 INFO L87 Difference]: Start difference. First operand 4006 states and 14356 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:26,864 INFO L93 Difference]: Finished difference Result 8151 states and 25974 transitions. [2021-07-13 20:49:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:49:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:49:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:26,880 INFO L225 Difference]: With dead ends: 8151 [2021-07-13 20:49:26,881 INFO L226 Difference]: Without dead ends: 8151 [2021-07-13 20:49:26,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:49:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-07-13 20:49:26,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 3759. [2021-07-13 20:49:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 3.5494944119212346) internal successors, (13339), 3758 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 13339 transitions. [2021-07-13 20:49:27,010 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 13339 transitions. Word has length 28 [2021-07-13 20:49:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:27,010 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 13339 transitions. [2021-07-13 20:49:27,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 13339 transitions. [2021-07-13 20:49:27,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:27,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:27,016 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:27,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-07-13 20:49:27,217 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-07-13 20:49:27,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:27,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065875859] [2021-07-13 20:49:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:27,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065875859] [2021-07-13 20:49:27,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065875859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:27,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454062744] [2021-07-13 20:49:27,248 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:27,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:27,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:27,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454062744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:27,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:27,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:49:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294962035] [2021-07-13 20:49:27,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:27,335 INFO L87 Difference]: Start difference. First operand 3759 states and 13339 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:27,995 INFO L93 Difference]: Finished difference Result 7259 states and 23813 transitions. [2021-07-13 20:49:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:49:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:49:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:28,010 INFO L225 Difference]: With dead ends: 7259 [2021-07-13 20:49:28,010 INFO L226 Difference]: Without dead ends: 7255 [2021-07-13 20:49:28,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:49:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2021-07-13 20:49:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 3392. [2021-07-13 20:49:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.5956944854025363) internal successors, (12193), 3391 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 12193 transitions. [2021-07-13 20:49:28,127 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 12193 transitions. Word has length 28 [2021-07-13 20:49:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:28,127 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 12193 transitions. [2021-07-13 20:49:28,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 12193 transitions. [2021-07-13 20:49:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:28,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:28,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:28,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-07-13 20:49:28,333 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-07-13 20:49:28,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:28,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716084982] [2021-07-13 20:49:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:28,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716084982] [2021-07-13 20:49:28,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716084982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790428558] [2021-07-13 20:49:28,368 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:28,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790428558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:28,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:28,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:28,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479067673] [2021-07-13 20:49:28,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:28,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:28,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:28,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:28,491 INFO L87 Difference]: Start difference. First operand 3392 states and 12193 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:29,452 INFO L93 Difference]: Finished difference Result 11542 states and 38132 transitions. [2021-07-13 20:49:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:49:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:29,478 INFO L225 Difference]: With dead ends: 11542 [2021-07-13 20:49:29,478 INFO L226 Difference]: Without dead ends: 11542 [2021-07-13 20:49:29,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 557.1ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:49:29,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-07-13 20:49:29,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 3680. [2021-07-13 20:49:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.678173416689318) internal successors, (13532), 3679 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13532 transitions. [2021-07-13 20:49:29,635 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13532 transitions. Word has length 28 [2021-07-13 20:49:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:29,635 INFO L482 AbstractCegarLoop]: Abstraction has 3680 states and 13532 transitions. [2021-07-13 20:49:29,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13532 transitions. [2021-07-13 20:49:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:29,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:29,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:29,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:29,842 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:29,842 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-07-13 20:49:29,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:29,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161233430] [2021-07-13 20:49:29,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:29,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:29,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161233430] [2021-07-13 20:49:29,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161233430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14386946] [2021-07-13 20:49:29,888 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:29,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:29,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14386946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:29,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:29,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:29,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899487916] [2021-07-13 20:49:29,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:29,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:29,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:29,996 INFO L87 Difference]: Start difference. First operand 3680 states and 13532 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:30,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:30,941 INFO L93 Difference]: Finished difference Result 11234 states and 37308 transitions. [2021-07-13 20:49:30,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:49:30,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:30,966 INFO L225 Difference]: With dead ends: 11234 [2021-07-13 20:49:30,966 INFO L226 Difference]: Without dead ends: 11234 [2021-07-13 20:49:30,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:49:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2021-07-13 20:49:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 3634. [2021-07-13 20:49:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 3.6584090283512247) internal successors, (13291), 3633 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:31,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 13291 transitions. [2021-07-13 20:49:31,107 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 13291 transitions. Word has length 28 [2021-07-13 20:49:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:31,107 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 13291 transitions. [2021-07-13 20:49:31,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 13291 transitions. [2021-07-13 20:49:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:31,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:31,113 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:31,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-07-13 20:49:31,314 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-07-13 20:49:31,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:31,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167130381] [2021-07-13 20:49:31,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:31,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:31,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167130381] [2021-07-13 20:49:31,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167130381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:31,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442780758] [2021-07-13 20:49:31,345 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:31,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:31,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:31,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442780758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:31,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:31,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:49:31,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139482503] [2021-07-13 20:49:31,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:31,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:31,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:31,444 INFO L87 Difference]: Start difference. First operand 3634 states and 13291 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-13 20:49:32,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:32,275 INFO L93 Difference]: Finished difference Result 10540 states and 33835 transitions. [2021-07-13 20:49:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:49:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-07-13 20:49:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:32,319 INFO L225 Difference]: With dead ends: 10540 [2021-07-13 20:49:32,319 INFO L226 Difference]: Without dead ends: 10540 [2021-07-13 20:49:32,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:49:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-07-13 20:49:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 3674. [2021-07-13 20:49:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.662673563844269) internal successors, (13453), 3673 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 13453 transitions. [2021-07-13 20:49:32,436 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 13453 transitions. Word has length 28 [2021-07-13 20:49:32,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:32,436 INFO L482 AbstractCegarLoop]: Abstraction has 3674 states and 13453 transitions. [2021-07-13 20:49:32,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-13 20:49:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 13453 transitions. [2021-07-13 20:49:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:32,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:32,442 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:32,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:32,643 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-07-13 20:49:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:32,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423647664] [2021-07-13 20:49:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:32,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:32,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423647664] [2021-07-13 20:49:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423647664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:32,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119156399] [2021-07-13 20:49:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:32,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:32,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119156399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:32,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:32,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:49:32,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63997508] [2021-07-13 20:49:32,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:32,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:32,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:32,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:32,764 INFO L87 Difference]: Start difference. First operand 3674 states and 13453 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-13 20:49:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:33,622 INFO L93 Difference]: Finished difference Result 9924 states and 32320 transitions. [2021-07-13 20:49:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:49:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-07-13 20:49:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:33,644 INFO L225 Difference]: With dead ends: 9924 [2021-07-13 20:49:33,644 INFO L226 Difference]: Without dead ends: 9916 [2021-07-13 20:49:33,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:49:33,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-07-13 20:49:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 3640. [2021-07-13 20:49:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 3.6575982412750756) internal successors, (13310), 3639 states have internal predecessors, (13310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 13310 transitions. [2021-07-13 20:49:33,772 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 13310 transitions. Word has length 28 [2021-07-13 20:49:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:33,772 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 13310 transitions. [2021-07-13 20:49:33,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-07-13 20:49:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 13310 transitions. [2021-07-13 20:49:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:33,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:33,778 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:33,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:33,978 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:33,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-07-13 20:49:33,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:33,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909938297] [2021-07-13 20:49:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:34,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909938297] [2021-07-13 20:49:34,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909938297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:34,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192713348] [2021-07-13 20:49:34,012 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:34,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:49:34,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:34,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192713348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:34,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:34,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:34,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682458331] [2021-07-13 20:49:34,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:34,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:34,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:34,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:34,124 INFO L87 Difference]: Start difference. First operand 3640 states and 13310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:35,021 INFO L93 Difference]: Finished difference Result 9536 states and 31236 transitions. [2021-07-13 20:49:35,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:49:35,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:49:35,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:35,043 INFO L225 Difference]: With dead ends: 9536 [2021-07-13 20:49:35,043 INFO L226 Difference]: Without dead ends: 9536 [2021-07-13 20:49:35,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 492.6ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:49:35,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-07-13 20:49:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 3656. [2021-07-13 20:49:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 3.6590971272229824) internal successors, (13374), 3655 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13374 transitions. [2021-07-13 20:49:35,181 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13374 transitions. Word has length 28 [2021-07-13 20:49:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:35,181 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 13374 transitions. [2021-07-13 20:49:35,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13374 transitions. [2021-07-13 20:49:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:35,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:35,186 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:35,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:35,387 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-07-13 20:49:35,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:35,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61908534] [2021-07-13 20:49:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:35,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:35,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61908534] [2021-07-13 20:49:35,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61908534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:35,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497954886] [2021-07-13 20:49:35,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:35,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:49:35,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:35,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:35,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497954886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:35,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:35,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:49:35,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106530264] [2021-07-13 20:49:35,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:35,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:35,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:35,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:35,538 INFO L87 Difference]: Start difference. First operand 3656 states and 13374 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:36,397 INFO L93 Difference]: Finished difference Result 9201 states and 30441 transitions. [2021-07-13 20:49:36,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:49:36,398 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:49:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:36,417 INFO L225 Difference]: With dead ends: 9201 [2021-07-13 20:49:36,417 INFO L226 Difference]: Without dead ends: 9193 [2021-07-13 20:49:36,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:49:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-07-13 20:49:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3324. [2021-07-13 20:49:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.570869696057779) internal successors, (11866), 3323 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11866 transitions. [2021-07-13 20:49:36,525 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11866 transitions. Word has length 28 [2021-07-13 20:49:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:36,525 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 11866 transitions. [2021-07-13 20:49:36,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11866 transitions. [2021-07-13 20:49:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:36,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:36,530 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:36,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,733 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:36,733 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-07-13 20:49:36,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:36,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87017905] [2021-07-13 20:49:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:36,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87017905] [2021-07-13 20:49:36,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87017905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687284221] [2021-07-13 20:49:36,770 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:36,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687284221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:36,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:36,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:49:36,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252189705] [2021-07-13 20:49:36,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:49:36,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:49:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:49:36,900 INFO L87 Difference]: Start difference. First operand 3324 states and 11866 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:49:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:37,656 INFO L93 Difference]: Finished difference Result 6988 states and 22842 transitions. [2021-07-13 20:49:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:49:37,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:49:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:37,672 INFO L225 Difference]: With dead ends: 6988 [2021-07-13 20:49:37,672 INFO L226 Difference]: Without dead ends: 6988 [2021-07-13 20:49:37,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:49:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-07-13 20:49:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 3336. [2021-07-13 20:49:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 3.569415292353823) internal successors, (11904), 3335 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 11904 transitions. [2021-07-13 20:49:37,755 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 11904 transitions. Word has length 28 [2021-07-13 20:49:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:37,755 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 11904 transitions. [2021-07-13 20:49:37,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:49:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 11904 transitions. [2021-07-13 20:49:37,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:37,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:37,760 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:37,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-13 20:49:37,961 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:37,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-07-13 20:49:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:37,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336054240] [2021-07-13 20:49:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:37,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:37,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336054240] [2021-07-13 20:49:37,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336054240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:37,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2996537] [2021-07-13 20:49:37,994 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:38,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:38,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2996537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:38,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:38,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:49:38,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530707077] [2021-07-13 20:49:38,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:38,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:38,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:38,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:38,115 INFO L87 Difference]: Start difference. First operand 3336 states and 11904 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:39,127 INFO L93 Difference]: Finished difference Result 7916 states and 25231 transitions. [2021-07-13 20:49:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:49:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:49:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:39,143 INFO L225 Difference]: With dead ends: 7916 [2021-07-13 20:49:39,144 INFO L226 Difference]: Without dead ends: 7916 [2021-07-13 20:49:39,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 627.3ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:49:39,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-07-13 20:49:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 3402. [2021-07-13 20:49:39,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5639517788885624) internal successors, (12121), 3401 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12121 transitions. [2021-07-13 20:49:39,239 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12121 transitions. Word has length 28 [2021-07-13 20:49:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:39,239 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 12121 transitions. [2021-07-13 20:49:39,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12121 transitions. [2021-07-13 20:49:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:39,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:39,244 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:39,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-07-13 20:49:39,445 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:39,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:39,445 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-07-13 20:49:39,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:39,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662580351] [2021-07-13 20:49:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:39,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:39,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:39,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662580351] [2021-07-13 20:49:39,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662580351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:39,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731827615] [2021-07-13 20:49:39,478 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:39,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:49:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:39,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:39,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731827615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:39,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:39,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:49:39,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849039410] [2021-07-13 20:49:39,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:39,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:39,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:39,591 INFO L87 Difference]: Start difference. First operand 3402 states and 12121 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:40,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:40,540 INFO L93 Difference]: Finished difference Result 7299 states and 23603 transitions. [2021-07-13 20:49:40,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:49:40,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:49:40,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:40,553 INFO L225 Difference]: With dead ends: 7299 [2021-07-13 20:49:40,554 INFO L226 Difference]: Without dead ends: 7295 [2021-07-13 20:49:40,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 552.8ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:49:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2021-07-13 20:49:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 3337. [2021-07-13 20:49:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.5617505995203835) internal successors, (11882), 3336 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:40,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11882 transitions. [2021-07-13 20:49:40,636 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11882 transitions. Word has length 28 [2021-07-13 20:49:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:40,636 INFO L482 AbstractCegarLoop]: Abstraction has 3337 states and 11882 transitions. [2021-07-13 20:49:40,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11882 transitions. [2021-07-13 20:49:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:40,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:40,641 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:40,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-13 20:49:40,841 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:40,842 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 72 times [2021-07-13 20:49:40,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:40,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609534590] [2021-07-13 20:49:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:40,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609534590] [2021-07-13 20:49:40,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609534590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:40,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051609813] [2021-07-13 20:49:40,879 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:40,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:49:40,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:40,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:40,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051609813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:40,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:40,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:49:40,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635531628] [2021-07-13 20:49:40,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:40,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:40,970 INFO L87 Difference]: Start difference. First operand 3337 states and 11882 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:41,501 INFO L93 Difference]: Finished difference Result 6442 states and 21191 transitions. [2021-07-13 20:49:41,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:49:41,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:41,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:41,514 INFO L225 Difference]: With dead ends: 6442 [2021-07-13 20:49:41,514 INFO L226 Difference]: Without dead ends: 6442 [2021-07-13 20:49:41,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:49:41,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2021-07-13 20:49:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 3341. [2021-07-13 20:49:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5634730538922157) internal successors, (11902), 3340 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11902 transitions. [2021-07-13 20:49:41,588 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11902 transitions. Word has length 28 [2021-07-13 20:49:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:41,589 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 11902 transitions. [2021-07-13 20:49:41,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11902 transitions. [2021-07-13 20:49:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:41,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:41,594 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:41,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-07-13 20:49:41,795 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 73 times [2021-07-13 20:49:41,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:41,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834553229] [2021-07-13 20:49:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:41,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:41,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834553229] [2021-07-13 20:49:41,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834553229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:41,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662210396] [2021-07-13 20:49:41,844 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:41,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:41,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:41,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662210396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:41,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:41,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:49:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605932152] [2021-07-13 20:49:41,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:41,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:41,939 INFO L87 Difference]: Start difference. First operand 3341 states and 11902 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:42,620 INFO L93 Difference]: Finished difference Result 6916 states and 22513 transitions. [2021-07-13 20:49:42,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:49:42,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:42,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:42,635 INFO L225 Difference]: With dead ends: 6916 [2021-07-13 20:49:42,636 INFO L226 Difference]: Without dead ends: 6916 [2021-07-13 20:49:42,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 391.7ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:49:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-07-13 20:49:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3355. [2021-07-13 20:49:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 3.5608228980322005) internal successors, (11943), 3354 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 11943 transitions. [2021-07-13 20:49:42,726 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 11943 transitions. Word has length 28 [2021-07-13 20:49:42,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:42,726 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 11943 transitions. [2021-07-13 20:49:42,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:42,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 11943 transitions. [2021-07-13 20:49:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:42,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:42,732 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:42,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-07-13 20:49:42,932 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 74 times [2021-07-13 20:49:42,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:42,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482265726] [2021-07-13 20:49:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482265726] [2021-07-13 20:49:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482265726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472920705] [2021-07-13 20:49:42,973 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:42,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:42,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:43,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472920705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:43,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:43,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:49:43,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870164805] [2021-07-13 20:49:43,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:43,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:43,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:43,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:43,067 INFO L87 Difference]: Start difference. First operand 3355 states and 11943 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:43,807 INFO L93 Difference]: Finished difference Result 7422 states and 23945 transitions. [2021-07-13 20:49:43,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:49:43,808 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:43,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:43,823 INFO L225 Difference]: With dead ends: 7422 [2021-07-13 20:49:43,824 INFO L226 Difference]: Without dead ends: 7422 [2021-07-13 20:49:43,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 455.3ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:49:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-07-13 20:49:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 3435. [2021-07-13 20:49:43,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.554164239953407) internal successors, (12205), 3434 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 12205 transitions. [2021-07-13 20:49:43,921 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 12205 transitions. Word has length 28 [2021-07-13 20:49:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:43,921 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 12205 transitions. [2021-07-13 20:49:43,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 12205 transitions. [2021-07-13 20:49:43,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:43,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:43,927 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:44,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-13 20:49:44,127 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 75 times [2021-07-13 20:49:44,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:44,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480647023] [2021-07-13 20:49:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:44,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480647023] [2021-07-13 20:49:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480647023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803933375] [2021-07-13 20:49:44,159 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:44,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:44,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:44,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:44,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:44,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803933375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:44,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:44,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:49:44,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952650833] [2021-07-13 20:49:44,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:49:44,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:44,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:49:44,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:49:44,271 INFO L87 Difference]: Start difference. First operand 3435 states and 12205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:44,784 INFO L93 Difference]: Finished difference Result 7221 states and 24725 transitions. [2021-07-13 20:49:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:49:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:44,799 INFO L225 Difference]: With dead ends: 7221 [2021-07-13 20:49:44,799 INFO L226 Difference]: Without dead ends: 7221 [2021-07-13 20:49:44,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:49:44,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-07-13 20:49:44,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4565. [2021-07-13 20:49:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.672655565293602) internal successors, (16762), 4564 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16762 transitions. [2021-07-13 20:49:44,902 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16762 transitions. Word has length 28 [2021-07-13 20:49:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 4565 states and 16762 transitions. [2021-07-13 20:49:44,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16762 transitions. [2021-07-13 20:49:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:44,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:44,909 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:45,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-07-13 20:49:45,110 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:45,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 76 times [2021-07-13 20:49:45,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:45,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417421175] [2021-07-13 20:49:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:45,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:45,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417421175] [2021-07-13 20:49:45,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417421175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545589229] [2021-07-13 20:49:45,146 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:45,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:45,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:45,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:45,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545589229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:45,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:45,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:49:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444064555] [2021-07-13 20:49:45,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:45,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:45,232 INFO L87 Difference]: Start difference. First operand 4565 states and 16762 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:45,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:45,919 INFO L93 Difference]: Finished difference Result 8350 states and 28540 transitions. [2021-07-13 20:49:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:49:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:45,937 INFO L225 Difference]: With dead ends: 8350 [2021-07-13 20:49:45,937 INFO L226 Difference]: Without dead ends: 8346 [2021-07-13 20:49:45,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:49:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-07-13 20:49:46,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 4457. [2021-07-13 20:49:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 3.683572710951526) internal successors, (16414), 4456 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 16414 transitions. [2021-07-13 20:49:46,050 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 16414 transitions. Word has length 28 [2021-07-13 20:49:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:46,050 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 16414 transitions. [2021-07-13 20:49:46,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 16414 transitions. [2021-07-13 20:49:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:46,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:46,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-07-13 20:49:46,273 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-07-13 20:49:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:46,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775793244] [2021-07-13 20:49:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:46,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:46,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775793244] [2021-07-13 20:49:46,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775793244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527026455] [2021-07-13 20:49:46,303 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 [2021-07-13 20:49:46,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:46,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:46,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:46,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527026455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:46,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:46,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:49:46,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802597398] [2021-07-13 20:49:46,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:46,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:46,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:46,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:46,406 INFO L87 Difference]: Start difference. First operand 4457 states and 16414 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:47,333 INFO L93 Difference]: Finished difference Result 9491 states and 32102 transitions. [2021-07-13 20:49:47,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:49:47,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:47,356 INFO L225 Difference]: With dead ends: 9491 [2021-07-13 20:49:47,357 INFO L226 Difference]: Without dead ends: 9479 [2021-07-13 20:49:47,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 487.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:49:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-07-13 20:49:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4937. [2021-07-13 20:49:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 3.7670178282009723) internal successors, (18594), 4936 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 18594 transitions. [2021-07-13 20:49:47,489 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 18594 transitions. Word has length 28 [2021-07-13 20:49:47,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:47,489 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 18594 transitions. [2021-07-13 20:49:47,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 18594 transitions. [2021-07-13 20:49:47,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:47,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:47,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:47,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:47,713 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-07-13 20:49:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:47,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881988326] [2021-07-13 20:49:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:47,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881988326] [2021-07-13 20:49:47,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881988326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242110295] [2021-07-13 20:49:47,738 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 [2021-07-13 20:49:47,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:49:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:47,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:47,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242110295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:47,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:47,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:49:47,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099237168] [2021-07-13 20:49:47,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:47,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:47,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:47,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:47,845 INFO L87 Difference]: Start difference. First operand 4937 states and 18594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:48,713 INFO L93 Difference]: Finished difference Result 9821 states and 33130 transitions. [2021-07-13 20:49:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:49:48,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:48,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:48,735 INFO L225 Difference]: With dead ends: 9821 [2021-07-13 20:49:48,735 INFO L226 Difference]: Without dead ends: 9821 [2021-07-13 20:49:48,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:49:48,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-07-13 20:49:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 4957. [2021-07-13 20:49:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.7516142050040355) internal successors, (18593), 4956 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 18593 transitions. [2021-07-13 20:49:48,914 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 18593 transitions. Word has length 28 [2021-07-13 20:49:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:48,914 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 18593 transitions. [2021-07-13 20:49:48,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 18593 transitions. [2021-07-13 20:49:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:48,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:48,923 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:49,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:49,123 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-07-13 20:49:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:49,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348107186] [2021-07-13 20:49:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:49,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:49,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348107186] [2021-07-13 20:49:49,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348107186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211372774] [2021-07-13 20:49:49,171 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 [2021-07-13 20:49:49,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:49:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211372774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:49,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:49,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:49:49,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619418932] [2021-07-13 20:49:49,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:49,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:49,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:49,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:49,251 INFO L87 Difference]: Start difference. First operand 4957 states and 18593 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:49:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:49,674 INFO L93 Difference]: Finished difference Result 9285 states and 33102 transitions. [2021-07-13 20:49:49,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:49:49,674 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:49:49,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:49,696 INFO L225 Difference]: With dead ends: 9285 [2021-07-13 20:49:49,696 INFO L226 Difference]: Without dead ends: 9202 [2021-07-13 20:49:49,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:49:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-07-13 20:49:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6390. [2021-07-13 20:49:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.796994834872437) internal successors, (24259), 6389 states have internal predecessors, (24259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 24259 transitions. [2021-07-13 20:49:49,852 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 24259 transitions. Word has length 28 [2021-07-13 20:49:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:49,853 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 24259 transitions. [2021-07-13 20:49:49,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:49:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 24259 transitions. [2021-07-13 20:49:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:49,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:49,865 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:50,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-07-13 20:49:50,081 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-07-13 20:49:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:50,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889716620] [2021-07-13 20:49:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:50,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889716620] [2021-07-13 20:49:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889716620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791556423] [2021-07-13 20:49:50,125 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 [2021-07-13 20:49:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:49:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791556423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:49:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312516154] [2021-07-13 20:49:50,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:49:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:49:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:49:50,227 INFO L87 Difference]: Start difference. First operand 6390 states and 24259 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:50,415 INFO L93 Difference]: Finished difference Result 8836 states and 31362 transitions. [2021-07-13 20:49:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:49:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:50,437 INFO L225 Difference]: With dead ends: 8836 [2021-07-13 20:49:50,437 INFO L226 Difference]: Without dead ends: 8836 [2021-07-13 20:49:50,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:49:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-07-13 20:49:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6536. [2021-07-13 20:49:50,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 3.7749043611323643) internal successors, (24669), 6535 states have internal predecessors, (24669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 24669 transitions. [2021-07-13 20:49:50,658 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 24669 transitions. Word has length 28 [2021-07-13 20:49:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 6536 states and 24669 transitions. [2021-07-13 20:49:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 24669 transitions. [2021-07-13 20:49:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:50,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:50,672 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:50,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:50,888 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:50,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:50,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-07-13 20:49:50,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:50,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112935063] [2021-07-13 20:49:50,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:50,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112935063] [2021-07-13 20:49:50,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112935063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:50,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517006220] [2021-07-13 20:49:50,947 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 [2021-07-13 20:49:50,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:50,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:50,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:50,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:51,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517006220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:51,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:51,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:49:51,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588968740] [2021-07-13 20:49:51,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:51,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:51,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:51,036 INFO L87 Difference]: Start difference. First operand 6536 states and 24669 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:51,754 INFO L93 Difference]: Finished difference Result 13521 states and 47319 transitions. [2021-07-13 20:49:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:49:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:51,790 INFO L225 Difference]: With dead ends: 13521 [2021-07-13 20:49:51,790 INFO L226 Difference]: Without dead ends: 13521 [2021-07-13 20:49:51,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:49:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-07-13 20:49:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7289. [2021-07-13 20:49:51,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 3.784714599341383) internal successors, (27583), 7288 states have internal predecessors, (27583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:52,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 27583 transitions. [2021-07-13 20:49:52,004 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 27583 transitions. Word has length 28 [2021-07-13 20:49:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:52,004 INFO L482 AbstractCegarLoop]: Abstraction has 7289 states and 27583 transitions. [2021-07-13 20:49:52,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 27583 transitions. [2021-07-13 20:49:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:52,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:52,017 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:52,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:52,233 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:52,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-07-13 20:49:52,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:52,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445398116] [2021-07-13 20:49:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:52,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:52,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445398116] [2021-07-13 20:49:52,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445398116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883524324] [2021-07-13 20:49:52,267 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 [2021-07-13 20:49:52,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:52,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:52,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:52,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:52,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883524324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:49:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833894390] [2021-07-13 20:49:52,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:52,349 INFO L87 Difference]: Start difference. First operand 7289 states and 27583 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:53,095 INFO L93 Difference]: Finished difference Result 13718 states and 48041 transitions. [2021-07-13 20:49:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:49:53,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:53,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:53,132 INFO L225 Difference]: With dead ends: 13718 [2021-07-13 20:49:53,133 INFO L226 Difference]: Without dead ends: 13718 [2021-07-13 20:49:53,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:49:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-07-13 20:49:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 7565. [2021-07-13 20:49:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 7564 states have (on average 3.7618984664198836) internal successors, (28455), 7564 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 28455 transitions. [2021-07-13 20:49:53,337 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 28455 transitions. Word has length 28 [2021-07-13 20:49:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:53,337 INFO L482 AbstractCegarLoop]: Abstraction has 7565 states and 28455 transitions. [2021-07-13 20:49:53,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 28455 transitions. [2021-07-13 20:49:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:53,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:53,350 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:53,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-07-13 20:49:53,566 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 82 times [2021-07-13 20:49:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:53,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094341534] [2021-07-13 20:49:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:53,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094341534] [2021-07-13 20:49:53,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094341534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072689854] [2021-07-13 20:49:53,591 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 [2021-07-13 20:49:53,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:49:53,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:53,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:53,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072689854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:53,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:53,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:49:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119053092] [2021-07-13 20:49:53,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:53,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:53,668 INFO L87 Difference]: Start difference. First operand 7565 states and 28455 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:54,013 INFO L93 Difference]: Finished difference Result 10107 states and 36572 transitions. [2021-07-13 20:49:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:49:54,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:49:54,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:54,038 INFO L225 Difference]: With dead ends: 10107 [2021-07-13 20:49:54,038 INFO L226 Difference]: Without dead ends: 10077 [2021-07-13 20:49:54,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:49:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10077 states. [2021-07-13 20:49:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10077 to 8418. [2021-07-13 20:49:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7842461684685755) internal successors, (31852), 8417 states have internal predecessors, (31852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31852 transitions. [2021-07-13 20:49:54,241 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31852 transitions. Word has length 28 [2021-07-13 20:49:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:54,241 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31852 transitions. [2021-07-13 20:49:54,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31852 transitions. [2021-07-13 20:49:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:54,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:54,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:54,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 20:49:54,457 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:54,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:54,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 83 times [2021-07-13 20:49:54,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:54,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203226562] [2021-07-13 20:49:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:54,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203226562] [2021-07-13 20:49:54,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203226562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579817803] [2021-07-13 20:49:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:54,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:49:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579817803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:54,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:54,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:49:54,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428871306] [2021-07-13 20:49:54,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:49:54,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:49:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:49:54,562 INFO L87 Difference]: Start difference. First operand 8418 states and 31852 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:54,906 INFO L93 Difference]: Finished difference Result 10717 states and 38597 transitions. [2021-07-13 20:49:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:49:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-07-13 20:49:54,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:54,931 INFO L225 Difference]: With dead ends: 10717 [2021-07-13 20:49:54,932 INFO L226 Difference]: Without dead ends: 10717 [2021-07-13 20:49:54,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:49:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10717 states. [2021-07-13 20:49:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 8458. [2021-07-13 20:49:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 3.780418588151827) internal successors, (31971), 8457 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 31971 transitions. [2021-07-13 20:49:55,117 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 31971 transitions. Word has length 28 [2021-07-13 20:49:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:55,117 INFO L482 AbstractCegarLoop]: Abstraction has 8458 states and 31971 transitions. [2021-07-13 20:49:55,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 31971 transitions. [2021-07-13 20:49:55,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:55,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:55,132 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:55,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:55,333 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 84 times [2021-07-13 20:49:55,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:55,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171166619] [2021-07-13 20:49:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:55,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:55,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171166619] [2021-07-13 20:49:55,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171166619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927791780] [2021-07-13 20:49:55,395 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 [2021-07-13 20:49:55,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:49:55,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:55,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:55,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:49:55,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927791780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:55,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:55,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-13 20:49:55,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009578089] [2021-07-13 20:49:55,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:55,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:55,530 INFO L87 Difference]: Start difference. First operand 8458 states and 31971 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:56,139 INFO L93 Difference]: Finished difference Result 14431 states and 51407 transitions. [2021-07-13 20:49:56,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:49:56,140 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:56,178 INFO L225 Difference]: With dead ends: 14431 [2021-07-13 20:49:56,179 INFO L226 Difference]: Without dead ends: 14427 [2021-07-13 20:49:56,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 327.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:49:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-07-13 20:49:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 8356. [2021-07-13 20:49:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8356 states, 8355 states have (on average 3.784320766008378) internal successors, (31618), 8355 states have internal predecessors, (31618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 31618 transitions. [2021-07-13 20:49:56,406 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 31618 transitions. Word has length 28 [2021-07-13 20:49:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:56,406 INFO L482 AbstractCegarLoop]: Abstraction has 8356 states and 31618 transitions. [2021-07-13 20:49:56,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 31618 transitions. [2021-07-13 20:49:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:56,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:56,422 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:56,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-07-13 20:49:56,622 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 85 times [2021-07-13 20:49:56,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:56,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552991115] [2021-07-13 20:49:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:56,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552991115] [2021-07-13 20:49:56,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552991115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802455996] [2021-07-13 20:49:56,653 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 [2021-07-13 20:49:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:56,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:49:56,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:56,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802455996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:56,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:56,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:49:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325167485] [2021-07-13 20:49:56,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:49:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:49:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:49:56,732 INFO L87 Difference]: Start difference. First operand 8356 states and 31618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:49:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:57,133 INFO L93 Difference]: Finished difference Result 10928 states and 39376 transitions. [2021-07-13 20:49:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:49:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:49:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:57,159 INFO L225 Difference]: With dead ends: 10928 [2021-07-13 20:49:57,159 INFO L226 Difference]: Without dead ends: 10928 [2021-07-13 20:49:57,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:49:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-07-13 20:49:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 8277. [2021-07-13 20:49:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.779603673272112) internal successors, (31280), 8276 states have internal predecessors, (31280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31280 transitions. [2021-07-13 20:49:57,374 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31280 transitions. Word has length 28 [2021-07-13 20:49:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:57,374 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31280 transitions. [2021-07-13 20:49:57,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:49:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31280 transitions. [2021-07-13 20:49:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:57,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:57,389 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:57,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:57,593 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:57,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:57,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 86 times [2021-07-13 20:49:57,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:57,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085206065] [2021-07-13 20:49:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085206065] [2021-07-13 20:49:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085206065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951478826] [2021-07-13 20:49:57,632 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 [2021-07-13 20:49:57,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:49:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:57,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:57,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:57,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951478826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:57,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:57,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:49:57,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737814797] [2021-07-13 20:49:57,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:49:57,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:57,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:49:57,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:49:57,708 INFO L87 Difference]: Start difference. First operand 8277 states and 31280 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:49:58,333 INFO L93 Difference]: Finished difference Result 14287 states and 50815 transitions. [2021-07-13 20:49:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:49:58,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:49:58,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:49:58,371 INFO L225 Difference]: With dead ends: 14287 [2021-07-13 20:49:58,371 INFO L226 Difference]: Without dead ends: 14275 [2021-07-13 20:49:58,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:49:58,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-07-13 20:49:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 8277. [2021-07-13 20:49:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.7791203479942) internal successors, (31276), 8276 states have internal predecessors, (31276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31276 transitions. [2021-07-13 20:49:58,610 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31276 transitions. Word has length 28 [2021-07-13 20:49:58,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:49:58,610 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31276 transitions. [2021-07-13 20:49:58,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:49:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31276 transitions. [2021-07-13 20:49:58,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:49:58,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:49:58,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:49:58,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-07-13 20:49:58,825 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:49:58,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:49:58,825 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 87 times [2021-07-13 20:49:58,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:49:58,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102653214] [2021-07-13 20:49:58,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:49:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:49:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:58,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:49:58,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102653214] [2021-07-13 20:49:58,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102653214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988130613] [2021-07-13 20:49:58,861 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:49:58,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:49:58,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:49:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:49:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:49:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:49:58,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988130613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:49:58,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:49:58,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:49:58,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734039743] [2021-07-13 20:49:58,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:49:58,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:49:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:49:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:49:58,951 INFO L87 Difference]: Start difference. First operand 8277 states and 31276 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:00,139 INFO L93 Difference]: Finished difference Result 21967 states and 76854 transitions. [2021-07-13 20:50:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:50:00,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:00,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:00,196 INFO L225 Difference]: With dead ends: 21967 [2021-07-13 20:50:00,196 INFO L226 Difference]: Without dead ends: 21967 [2021-07-13 20:50:00,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 685.3ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:50:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2021-07-13 20:50:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 11428. [2021-07-13 20:50:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 3.8238382777631923) internal successors, (43695), 11427 states have internal predecessors, (43695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 43695 transitions. [2021-07-13 20:50:00,608 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 43695 transitions. Word has length 28 [2021-07-13 20:50:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:00,608 INFO L482 AbstractCegarLoop]: Abstraction has 11428 states and 43695 transitions. [2021-07-13 20:50:00,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 43695 transitions. [2021-07-13 20:50:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:00,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:00,631 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:00,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-07-13 20:50:00,832 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 88 times [2021-07-13 20:50:00,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:00,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293971566] [2021-07-13 20:50:00,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293971566] [2021-07-13 20:50:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293971566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723633435] [2021-07-13 20:50:00,874 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:00,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:00,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:00,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:00,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723633435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:00,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:00,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:50:00,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052395194] [2021-07-13 20:50:00,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:00,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:00,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:00,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:00,957 INFO L87 Difference]: Start difference. First operand 11428 states and 43695 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:02,068 INFO L93 Difference]: Finished difference Result 21082 states and 74573 transitions. [2021-07-13 20:50:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:50:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:02,136 INFO L225 Difference]: With dead ends: 21082 [2021-07-13 20:50:02,136 INFO L226 Difference]: Without dead ends: 21070 [2021-07-13 20:50:02,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:50:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-07-13 20:50:02,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11250. [2021-07-13 20:50:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.8307405102675793) internal successors, (43092), 11249 states have internal predecessors, (43092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 43092 transitions. [2021-07-13 20:50:02,565 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 43092 transitions. Word has length 28 [2021-07-13 20:50:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:02,565 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 43092 transitions. [2021-07-13 20:50:02,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:02,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 43092 transitions. [2021-07-13 20:50:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:02,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:02,585 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:02,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:02,785 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 89 times [2021-07-13 20:50:02,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:02,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543107182] [2021-07-13 20:50:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543107182] [2021-07-13 20:50:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543107182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431493887] [2021-07-13 20:50:02,823 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:02,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:50:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:02,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:02,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431493887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:02,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:02,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:50:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143832932] [2021-07-13 20:50:02,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:02,910 INFO L87 Difference]: Start difference. First operand 11250 states and 43092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:03,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:03,880 INFO L93 Difference]: Finished difference Result 20939 states and 73944 transitions. [2021-07-13 20:50:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:50:03,881 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:03,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:03,940 INFO L225 Difference]: With dead ends: 20939 [2021-07-13 20:50:03,940 INFO L226 Difference]: Without dead ends: 20903 [2021-07-13 20:50:03,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:50:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-07-13 20:50:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11290. [2021-07-13 20:50:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 3.8302772610505804) internal successors, (43240), 11289 states have internal predecessors, (43240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 43240 transitions. [2021-07-13 20:50:04,331 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 43240 transitions. Word has length 28 [2021-07-13 20:50:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:04,331 INFO L482 AbstractCegarLoop]: Abstraction has 11290 states and 43240 transitions. [2021-07-13 20:50:04,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 43240 transitions. [2021-07-13 20:50:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:04,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:04,352 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:04,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:04,553 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 90 times [2021-07-13 20:50:04,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:04,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410627306] [2021-07-13 20:50:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:04,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410627306] [2021-07-13 20:50:04,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410627306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983566308] [2021-07-13 20:50:04,591 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:04,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:50:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:04,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983566308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:04,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:04,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:50:04,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239712811] [2021-07-13 20:50:04,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:04,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:04,709 INFO L87 Difference]: Start difference. First operand 11290 states and 43240 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:06,149 INFO L93 Difference]: Finished difference Result 20726 states and 73402 transitions. [2021-07-13 20:50:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-07-13 20:50:06,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:50:06,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:06,209 INFO L225 Difference]: With dead ends: 20726 [2021-07-13 20:50:06,209 INFO L226 Difference]: Without dead ends: 20726 [2021-07-13 20:50:06,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 856.6ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:50:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2021-07-13 20:50:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 11482. [2021-07-13 20:50:06,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11482 states, 11481 states have (on average 3.8212699242226287) internal successors, (43872), 11481 states have internal predecessors, (43872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11482 states to 11482 states and 43872 transitions. [2021-07-13 20:50:06,606 INFO L78 Accepts]: Start accepts. Automaton has 11482 states and 43872 transitions. Word has length 28 [2021-07-13 20:50:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:06,606 INFO L482 AbstractCegarLoop]: Abstraction has 11482 states and 43872 transitions. [2021-07-13 20:50:06,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 11482 states and 43872 transitions. [2021-07-13 20:50:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:06,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:06,627 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:06,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-07-13 20:50:06,827 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:06,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:06,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 91 times [2021-07-13 20:50:06,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:06,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423086238] [2021-07-13 20:50:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:06,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:06,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423086238] [2021-07-13 20:50:06,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423086238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:06,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076622883] [2021-07-13 20:50:06,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:06,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:06,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076622883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:06,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:06,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:50:06,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287583618] [2021-07-13 20:50:06,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:06,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:06,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:06,984 INFO L87 Difference]: Start difference. First operand 11482 states and 43872 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:08,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:08,257 INFO L93 Difference]: Finished difference Result 20187 states and 71933 transitions. [2021-07-13 20:50:08,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:50:08,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:50:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:08,324 INFO L225 Difference]: With dead ends: 20187 [2021-07-13 20:50:08,324 INFO L226 Difference]: Without dead ends: 20175 [2021-07-13 20:50:08,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:50:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-07-13 20:50:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 11366. [2021-07-13 20:50:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.825780906291245) internal successors, (43480), 11365 states have internal predecessors, (43480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 43480 transitions. [2021-07-13 20:50:08,694 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 43480 transitions. Word has length 28 [2021-07-13 20:50:08,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:08,694 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 43480 transitions. [2021-07-13 20:50:08,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 43480 transitions. [2021-07-13 20:50:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:08,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:08,715 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:08,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-07-13 20:50:08,915 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 92 times [2021-07-13 20:50:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:08,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17509867] [2021-07-13 20:50:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:08,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:08,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17509867] [2021-07-13 20:50:08,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17509867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:08,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879818742] [2021-07-13 20:50:08,956 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:08,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:08,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:08,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:08,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:09,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:09,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879818742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:09,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:09,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:50:09,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601416183] [2021-07-13 20:50:09,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:50:09,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:50:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:50:09,049 INFO L87 Difference]: Start difference. First operand 11366 states and 43480 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:50:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:10,266 INFO L93 Difference]: Finished difference Result 19429 states and 69858 transitions. [2021-07-13 20:50:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:50:10,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:50:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:10,322 INFO L225 Difference]: With dead ends: 19429 [2021-07-13 20:50:10,322 INFO L226 Difference]: Without dead ends: 19393 [2021-07-13 20:50:10,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:50:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2021-07-13 20:50:10,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 11390. [2021-07-13 20:50:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11390 states, 11389 states have (on average 3.8247431732373345) internal successors, (43560), 11389 states have internal predecessors, (43560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11390 states to 11390 states and 43560 transitions. [2021-07-13 20:50:10,695 INFO L78 Accepts]: Start accepts. Automaton has 11390 states and 43560 transitions. Word has length 28 [2021-07-13 20:50:10,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:10,696 INFO L482 AbstractCegarLoop]: Abstraction has 11390 states and 43560 transitions. [2021-07-13 20:50:10,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:50:10,696 INFO L276 IsEmpty]: Start isEmpty. Operand 11390 states and 43560 transitions. [2021-07-13 20:50:10,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:10,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:10,718 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:10,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 20:50:10,935 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 93 times [2021-07-13 20:50:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:10,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605476719] [2021-07-13 20:50:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:10,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:10,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605476719] [2021-07-13 20:50:10,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605476719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:10,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479427582] [2021-07-13 20:50:10,970 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:10,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:50:10,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:10,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479427582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:11,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:11,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:11,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259587061] [2021-07-13 20:50:11,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:11,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:11,093 INFO L87 Difference]: Start difference. First operand 11390 states and 43560 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:12,612 INFO L93 Difference]: Finished difference Result 28523 states and 101952 transitions. [2021-07-13 20:50:12,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:50:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:12,712 INFO L225 Difference]: With dead ends: 28523 [2021-07-13 20:50:12,713 INFO L226 Difference]: Without dead ends: 28523 [2021-07-13 20:50:12,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 804.6ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:50:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28523 states. [2021-07-13 20:50:13,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28523 to 11724. [2021-07-13 20:50:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11724 states, 11723 states have (on average 3.850294293269641) internal successors, (45137), 11723 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11724 states to 11724 states and 45137 transitions. [2021-07-13 20:50:13,422 INFO L78 Accepts]: Start accepts. Automaton has 11724 states and 45137 transitions. Word has length 28 [2021-07-13 20:50:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:13,422 INFO L482 AbstractCegarLoop]: Abstraction has 11724 states and 45137 transitions. [2021-07-13 20:50:13,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 11724 states and 45137 transitions. [2021-07-13 20:50:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:13,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:13,447 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:13,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 20:50:13,664 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:13,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 94 times [2021-07-13 20:50:13,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:13,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503683957] [2021-07-13 20:50:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:13,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503683957] [2021-07-13 20:50:13,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503683957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:13,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667128512] [2021-07-13 20:50:13,845 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:13,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:13,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:13,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667128512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:13,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:13,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475714003] [2021-07-13 20:50:13,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:13,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:13,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:13,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:13,963 INFO L87 Difference]: Start difference. First operand 11724 states and 45137 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:15,309 INFO L93 Difference]: Finished difference Result 27968 states and 100678 transitions. [2021-07-13 20:50:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 20:50:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:15,391 INFO L225 Difference]: With dead ends: 27968 [2021-07-13 20:50:15,391 INFO L226 Difference]: Without dead ends: 27968 [2021-07-13 20:50:15,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-07-13 20:50:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27968 states. [2021-07-13 20:50:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27968 to 11614. [2021-07-13 20:50:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11614 states, 11613 states have (on average 3.837595797812796) internal successors, (44566), 11613 states have internal predecessors, (44566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11614 states to 11614 states and 44566 transitions. [2021-07-13 20:50:16,029 INFO L78 Accepts]: Start accepts. Automaton has 11614 states and 44566 transitions. Word has length 28 [2021-07-13 20:50:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:16,029 INFO L482 AbstractCegarLoop]: Abstraction has 11614 states and 44566 transitions. [2021-07-13 20:50:16,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 11614 states and 44566 transitions. [2021-07-13 20:50:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:16,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:16,052 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:16,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-07-13 20:50:16,268 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:16,269 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 95 times [2021-07-13 20:50:16,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:16,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008022555] [2021-07-13 20:50:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:16,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008022555] [2021-07-13 20:50:16,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008022555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:16,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668137693] [2021-07-13 20:50:16,304 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:16,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:50:16,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668137693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:16,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:16,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:50:16,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464092668] [2021-07-13 20:50:16,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:50:16,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:16,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:50:16,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:50:16,424 INFO L87 Difference]: Start difference. First operand 11614 states and 44566 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:17,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:17,510 INFO L93 Difference]: Finished difference Result 22124 states and 79964 transitions. [2021-07-13 20:50:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:50:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:17,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:17,567 INFO L225 Difference]: With dead ends: 22124 [2021-07-13 20:50:17,568 INFO L226 Difference]: Without dead ends: 22124 [2021-07-13 20:50:17,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:50:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22124 states. [2021-07-13 20:50:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22124 to 11623. [2021-07-13 20:50:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 11622 states have (on average 3.8366029943211153) internal successors, (44589), 11622 states have internal predecessors, (44589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 44589 transitions. [2021-07-13 20:50:17,914 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 44589 transitions. Word has length 28 [2021-07-13 20:50:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:17,914 INFO L482 AbstractCegarLoop]: Abstraction has 11623 states and 44589 transitions. [2021-07-13 20:50:17,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 44589 transitions. [2021-07-13 20:50:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:17,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:17,936 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:18,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:18,137 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-07-13 20:50:18,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:18,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127508924] [2021-07-13 20:50:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:18,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127508924] [2021-07-13 20:50:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127508924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:18,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218682762] [2021-07-13 20:50:18,169 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:18,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:50:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:18,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:18,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218682762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:18,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:18,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:50:18,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451805681] [2021-07-13 20:50:18,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:50:18,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:18,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:50:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:50:18,283 INFO L87 Difference]: Start difference. First operand 11623 states and 44589 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:50:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:19,121 INFO L93 Difference]: Finished difference Result 20483 states and 74724 transitions. [2021-07-13 20:50:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:50:19,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:50:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:19,178 INFO L225 Difference]: With dead ends: 20483 [2021-07-13 20:50:19,178 INFO L226 Difference]: Without dead ends: 20483 [2021-07-13 20:50:19,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:50:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-07-13 20:50:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 11635. [2021-07-13 20:50:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.8359119821213685) internal successors, (44627), 11634 states have internal predecessors, (44627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 44627 transitions. [2021-07-13 20:50:19,600 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 44627 transitions. Word has length 28 [2021-07-13 20:50:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:19,600 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 44627 transitions. [2021-07-13 20:50:19,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:50:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 44627 transitions. [2021-07-13 20:50:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:19,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:19,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:19,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-07-13 20:50:19,822 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-07-13 20:50:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:19,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302011979] [2021-07-13 20:50:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:19,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:19,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302011979] [2021-07-13 20:50:19,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302011979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:19,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515415714] [2021-07-13 20:50:19,853 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515415714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:19,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:19,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444313881] [2021-07-13 20:50:19,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:19,968 INFO L87 Difference]: Start difference. First operand 11635 states and 44627 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:21,093 INFO L93 Difference]: Finished difference Result 21266 states and 76961 transitions. [2021-07-13 20:50:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 20:50:21,093 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:50:21,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:21,160 INFO L225 Difference]: With dead ends: 21266 [2021-07-13 20:50:21,160 INFO L226 Difference]: Without dead ends: 21266 [2021-07-13 20:50:21,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:50:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-07-13 20:50:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 11743. [2021-07-13 20:50:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 3.8290751149718956) internal successors, (44961), 11742 states have internal predecessors, (44961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:21,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 44961 transitions. [2021-07-13 20:50:21,565 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 44961 transitions. Word has length 28 [2021-07-13 20:50:21,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:21,565 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 44961 transitions. [2021-07-13 20:50:21,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 44961 transitions. [2021-07-13 20:50:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:21,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:21,585 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:21,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:21,786 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-07-13 20:50:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:21,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851953144] [2021-07-13 20:50:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:21,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:21,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851953144] [2021-07-13 20:50:21,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851953144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:21,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123298844] [2021-07-13 20:50:21,822 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:21,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:21,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:21,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123298844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:21,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:21,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:21,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749753143] [2021-07-13 20:50:21,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:21,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:21,943 INFO L87 Difference]: Start difference. First operand 11743 states and 44961 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:22,973 INFO L93 Difference]: Finished difference Result 20647 states and 75257 transitions. [2021-07-13 20:50:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:50:22,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:50:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:23,035 INFO L225 Difference]: With dead ends: 20647 [2021-07-13 20:50:23,036 INFO L226 Difference]: Without dead ends: 20643 [2021-07-13 20:50:23,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:50:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2021-07-13 20:50:23,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 11669. [2021-07-13 20:50:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.8328762427151184) internal successors, (44722), 11668 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44722 transitions. [2021-07-13 20:50:23,481 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44722 transitions. Word has length 28 [2021-07-13 20:50:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:23,481 INFO L482 AbstractCegarLoop]: Abstraction has 11669 states and 44722 transitions. [2021-07-13 20:50:23,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44722 transitions. [2021-07-13 20:50:23,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:23,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:23,502 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:23,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:23,702 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:23,703 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-07-13 20:50:23,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:23,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740155482] [2021-07-13 20:50:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:23,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:23,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740155482] [2021-07-13 20:50:23,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740155482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:23,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553594354] [2021-07-13 20:50:23,743 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:23,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:50:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:23,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553594354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:23,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:23,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:50:23,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962782515] [2021-07-13 20:50:23,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:23,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:23,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:23,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:23,923 INFO L87 Difference]: Start difference. First operand 11669 states and 44722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:50:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:24,947 INFO L93 Difference]: Finished difference Result 19952 states and 72022 transitions. [2021-07-13 20:50:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 20:50:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:50:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:25,002 INFO L225 Difference]: With dead ends: 19952 [2021-07-13 20:50:25,002 INFO L226 Difference]: Without dead ends: 19952 [2021-07-13 20:50:25,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:50:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2021-07-13 20:50:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 11896. [2021-07-13 20:50:25,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 3.8352248844052124) internal successors, (45620), 11895 states have internal predecessors, (45620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:25,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 45620 transitions. [2021-07-13 20:50:25,446 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 45620 transitions. Word has length 28 [2021-07-13 20:50:25,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:25,446 INFO L482 AbstractCegarLoop]: Abstraction has 11896 states and 45620 transitions. [2021-07-13 20:50:25,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:50:25,446 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 45620 transitions. [2021-07-13 20:50:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:25,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:25,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:25,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-13 20:50:25,668 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-07-13 20:50:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:25,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276897741] [2021-07-13 20:50:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:25,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276897741] [2021-07-13 20:50:25,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276897741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:25,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827599749] [2021-07-13 20:50:25,707 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:25,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:25,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:25,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:25,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:25,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827599749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:25,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:25,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:50:25,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814596372] [2021-07-13 20:50:25,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:25,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:25,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:25,811 INFO L87 Difference]: Start difference. First operand 11896 states and 45620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:50:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:26,714 INFO L93 Difference]: Finished difference Result 19483 states and 70731 transitions. [2021-07-13 20:50:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:50:26,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:50:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:26,776 INFO L225 Difference]: With dead ends: 19483 [2021-07-13 20:50:26,776 INFO L226 Difference]: Without dead ends: 19471 [2021-07-13 20:50:26,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:50:26,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-07-13 20:50:27,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 11998. [2021-07-13 20:50:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11998 states, 11997 states have (on average 3.8295407185129617) internal successors, (45943), 11997 states have internal predecessors, (45943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11998 states to 11998 states and 45943 transitions. [2021-07-13 20:50:27,219 INFO L78 Accepts]: Start accepts. Automaton has 11998 states and 45943 transitions. Word has length 28 [2021-07-13 20:50:27,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:27,219 INFO L482 AbstractCegarLoop]: Abstraction has 11998 states and 45943 transitions. [2021-07-13 20:50:27,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:50:27,219 INFO L276 IsEmpty]: Start isEmpty. Operand 11998 states and 45943 transitions. [2021-07-13 20:50:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:27,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:27,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:27,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:27,443 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:27,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 77 times [2021-07-13 20:50:27,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:27,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232462658] [2021-07-13 20:50:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:27,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:27,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232462658] [2021-07-13 20:50:27,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232462658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:27,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967452096] [2021-07-13 20:50:27,496 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:27,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:50:27,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:27,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967452096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:27,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:27,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:50:27,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869288780] [2021-07-13 20:50:27,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:27,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:27,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:27,582 INFO L87 Difference]: Start difference. First operand 11998 states and 45943 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:50:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:28,044 INFO L93 Difference]: Finished difference Result 16918 states and 62875 transitions. [2021-07-13 20:50:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:50:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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 28 [2021-07-13 20:50:28,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:28,090 INFO L225 Difference]: With dead ends: 16918 [2021-07-13 20:50:28,091 INFO L226 Difference]: Without dead ends: 16918 [2021-07-13 20:50:28,091 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:50:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-07-13 20:50:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 12070. [2021-07-13 20:50:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 12069 states have (on average 3.824923357361836) internal successors, (46163), 12069 states have internal predecessors, (46163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 46163 transitions. [2021-07-13 20:50:28,420 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 46163 transitions. Word has length 28 [2021-07-13 20:50:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:28,420 INFO L482 AbstractCegarLoop]: Abstraction has 12070 states and 46163 transitions. [2021-07-13 20:50:28,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:50:28,420 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 46163 transitions. [2021-07-13 20:50:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:28,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:28,443 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:28,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-13 20:50:28,657 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 78 times [2021-07-13 20:50:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:28,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125402782] [2021-07-13 20:50:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:28,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:28,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125402782] [2021-07-13 20:50:28,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125402782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:28,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539112652] [2021-07-13 20:50:28,690 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:28,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:50:28,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:28,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:28,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539112652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:28,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:28,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:50:28,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659247556] [2021-07-13 20:50:28,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:28,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:28,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:28,802 INFO L87 Difference]: Start difference. First operand 12070 states and 46163 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:29,304 INFO L93 Difference]: Finished difference Result 15210 states and 56302 transitions. [2021-07-13 20:50:29,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:50:29,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:29,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:29,349 INFO L225 Difference]: With dead ends: 15210 [2021-07-13 20:50:29,349 INFO L226 Difference]: Without dead ends: 15169 [2021-07-13 20:50:29,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 20:50:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-07-13 20:50:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 11722. [2021-07-13 20:50:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.8192133776981487) internal successors, (44765), 11721 states have internal predecessors, (44765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:29,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 44765 transitions. [2021-07-13 20:50:29,668 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 44765 transitions. Word has length 28 [2021-07-13 20:50:29,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:29,668 INFO L482 AbstractCegarLoop]: Abstraction has 11722 states and 44765 transitions. [2021-07-13 20:50:29,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:29,668 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 44765 transitions. [2021-07-13 20:50:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:29,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:29,689 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:29,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-13 20:50:29,889 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:29,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 79 times [2021-07-13 20:50:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:29,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843851174] [2021-07-13 20:50:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:29,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:29,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843851174] [2021-07-13 20:50:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843851174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:29,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040364192] [2021-07-13 20:50:29,929 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:30,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040364192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:30,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:30,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:50:30,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585921401] [2021-07-13 20:50:30,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:50:30,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:30,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:50:30,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:50:30,040 INFO L87 Difference]: Start difference. First operand 11722 states and 44765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:50:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:30,542 INFO L93 Difference]: Finished difference Result 17574 states and 64350 transitions. [2021-07-13 20:50:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:50:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:50:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:30,593 INFO L225 Difference]: With dead ends: 17574 [2021-07-13 20:50:30,593 INFO L226 Difference]: Without dead ends: 17574 [2021-07-13 20:50:30,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:50:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-07-13 20:50:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 12034. [2021-07-13 20:50:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 3.802626111526635) internal successors, (45757), 12033 states have internal predecessors, (45757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 45757 transitions. [2021-07-13 20:50:31,001 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 45757 transitions. Word has length 28 [2021-07-13 20:50:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:31,001 INFO L482 AbstractCegarLoop]: Abstraction has 12034 states and 45757 transitions. [2021-07-13 20:50:31,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:50:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 45757 transitions. [2021-07-13 20:50:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:31,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:31,023 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:31,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 20:50:31,225 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:31,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1138878323, now seen corresponding path program 80 times [2021-07-13 20:50:31,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:31,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527590328] [2021-07-13 20:50:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:31,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:31,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527590328] [2021-07-13 20:50:31,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527590328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:31,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759767954] [2021-07-13 20:50:31,276 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:31,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:31,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:31,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:31,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759767954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:31,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:31,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-13 20:50:31,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131013040] [2021-07-13 20:50:31,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:31,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:31,437 INFO L87 Difference]: Start difference. First operand 12034 states and 45757 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:31,950 INFO L93 Difference]: Finished difference Result 16784 states and 62443 transitions. [2021-07-13 20:50:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:50:31,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:31,997 INFO L225 Difference]: With dead ends: 16784 [2021-07-13 20:50:31,997 INFO L226 Difference]: Without dead ends: 16774 [2021-07-13 20:50:31,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:50:32,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-07-13 20:50:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 14052. [2021-07-13 20:50:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 3.8370222759945913) internal successors, (53914), 14051 states have internal predecessors, (53914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 53914 transitions. [2021-07-13 20:50:32,325 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 53914 transitions. Word has length 28 [2021-07-13 20:50:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:32,325 INFO L482 AbstractCegarLoop]: Abstraction has 14052 states and 53914 transitions. [2021-07-13 20:50:32,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 53914 transitions. [2021-07-13 20:50:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:32,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:32,351 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:32,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 20:50:32,552 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:32,552 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 81 times [2021-07-13 20:50:32,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:32,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724260622] [2021-07-13 20:50:32,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:32,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724260622] [2021-07-13 20:50:32,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724260622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:32,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159493218] [2021-07-13 20:50:32,585 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:32,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:50:32,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:32,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:32,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159493218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:32,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:32,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:50:32,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836265922] [2021-07-13 20:50:32,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:50:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:50:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:50:32,673 INFO L87 Difference]: Start difference. First operand 14052 states and 53914 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:50:33,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:33,151 INFO L93 Difference]: Finished difference Result 19306 states and 72104 transitions. [2021-07-13 20:50:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:50:33,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:50:33,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:33,205 INFO L225 Difference]: With dead ends: 19306 [2021-07-13 20:50:33,205 INFO L226 Difference]: Without dead ends: 19298 [2021-07-13 20:50:33,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 20:50:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19298 states. [2021-07-13 20:50:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19298 to 13972. [2021-07-13 20:50:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 13971 states have (on average 3.8398110371483787) internal successors, (53646), 13971 states have internal predecessors, (53646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 53646 transitions. [2021-07-13 20:50:33,598 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 53646 transitions. Word has length 28 [2021-07-13 20:50:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:33,598 INFO L482 AbstractCegarLoop]: Abstraction has 13972 states and 53646 transitions. [2021-07-13 20:50:33,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:50:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 53646 transitions. [2021-07-13 20:50:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:33,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:33,624 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:33,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:33,825 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 82 times [2021-07-13 20:50:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:33,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046213145] [2021-07-13 20:50:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:33,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046213145] [2021-07-13 20:50:33,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046213145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:33,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291112697] [2021-07-13 20:50:33,862 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:33,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291112697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:33,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:33,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:50:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613004431] [2021-07-13 20:50:33,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:33,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:33,940 INFO L87 Difference]: Start difference. First operand 13972 states and 53646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:50:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:34,394 INFO L93 Difference]: Finished difference Result 19186 states and 71752 transitions. [2021-07-13 20:50:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:50:34,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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 28 [2021-07-13 20:50:34,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:34,449 INFO L225 Difference]: With dead ends: 19186 [2021-07-13 20:50:34,450 INFO L226 Difference]: Without dead ends: 19174 [2021-07-13 20:50:34,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:50:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-07-13 20:50:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 13938. [2021-07-13 20:50:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13938 states, 13937 states have (on average 3.841788046207936) internal successors, (53543), 13937 states have internal predecessors, (53543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:34,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13938 states to 13938 states and 53543 transitions. [2021-07-13 20:50:34,807 INFO L78 Accepts]: Start accepts. Automaton has 13938 states and 53543 transitions. Word has length 28 [2021-07-13 20:50:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:34,807 INFO L482 AbstractCegarLoop]: Abstraction has 13938 states and 53543 transitions. [2021-07-13 20:50:34,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:50:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 13938 states and 53543 transitions. [2021-07-13 20:50:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:34,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:34,834 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:35,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-07-13 20:50:35,035 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 83 times [2021-07-13 20:50:35,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:35,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268301950] [2021-07-13 20:50:35,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:35,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:35,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:35,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268301950] [2021-07-13 20:50:35,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268301950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:35,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140734866] [2021-07-13 20:50:35,078 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:35,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:50:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:35,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140734866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:35,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:35,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:50:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486337362] [2021-07-13 20:50:35,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:50:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:50:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:50:35,198 INFO L87 Difference]: Start difference. First operand 13938 states and 53543 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:36,218 INFO L93 Difference]: Finished difference Result 26084 states and 94333 transitions. [2021-07-13 20:50:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:50:36,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-07-13 20:50:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:36,492 INFO L225 Difference]: With dead ends: 26084 [2021-07-13 20:50:36,492 INFO L226 Difference]: Without dead ends: 26084 [2021-07-13 20:50:36,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:50:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-07-13 20:50:36,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 13918. [2021-07-13 20:50:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 3.840698426384997) internal successors, (53451), 13917 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 53451 transitions. [2021-07-13 20:50:36,912 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 53451 transitions. Word has length 28 [2021-07-13 20:50:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:36,912 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 53451 transitions. [2021-07-13 20:50:36,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 53451 transitions. [2021-07-13 20:50:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:36,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:36,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:37,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-07-13 20:50:37,141 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 101 times [2021-07-13 20:50:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893587475] [2021-07-13 20:50:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:37,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:37,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893587475] [2021-07-13 20:50:37,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893587475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:37,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723015207] [2021-07-13 20:50:37,168 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:37,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:50:37,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:37,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:37,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:37,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723015207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:37,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:37,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:50:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363940137] [2021-07-13 20:50:37,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:37,277 INFO L87 Difference]: Start difference. First operand 13918 states and 53451 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:38,028 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-07-13 20:50:38,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:38,131 INFO L93 Difference]: Finished difference Result 21840 states and 79850 transitions. [2021-07-13 20:50:38,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:50:38,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-07-13 20:50:38,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:38,192 INFO L225 Difference]: With dead ends: 21840 [2021-07-13 20:50:38,192 INFO L226 Difference]: Without dead ends: 21827 [2021-07-13 20:50:38,192 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:50:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2021-07-13 20:50:38,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 15432. [2021-07-13 20:50:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15431 states have (on average 3.899293629706435) internal successors, (60170), 15431 states have internal predecessors, (60170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:38,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 60170 transitions. [2021-07-13 20:50:38,650 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 60170 transitions. Word has length 28 [2021-07-13 20:50:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:38,650 INFO L482 AbstractCegarLoop]: Abstraction has 15432 states and 60170 transitions. [2021-07-13 20:50:38,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 60170 transitions. [2021-07-13 20:50:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:38,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:38,680 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-07-13 20:50:38,889 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 102 times [2021-07-13 20:50:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:38,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18708876] [2021-07-13 20:50:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:50:38,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18708876] [2021-07-13 20:50:38,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18708876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:38,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543951699] [2021-07-13 20:50:38,926 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:38,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:50:38,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:38,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:39,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543951699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:39,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:39,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 20:50:39,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078238841] [2021-07-13 20:50:39,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:39,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:39,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:39,028 INFO L87 Difference]: Start difference. First operand 15432 states and 60170 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:39,936 INFO L93 Difference]: Finished difference Result 22001 states and 80297 transitions. [2021-07-13 20:50:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:50:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-07-13 20:50:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:40,001 INFO L225 Difference]: With dead ends: 22001 [2021-07-13 20:50:40,001 INFO L226 Difference]: Without dead ends: 21986 [2021-07-13 20:50:40,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:50:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-07-13 20:50:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 15399. [2021-07-13 20:50:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 3.89829848032212) internal successors, (60026), 15398 states have internal predecessors, (60026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 60026 transitions. [2021-07-13 20:50:40,481 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 60026 transitions. Word has length 28 [2021-07-13 20:50:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:40,481 INFO L482 AbstractCegarLoop]: Abstraction has 15399 states and 60026 transitions. [2021-07-13 20:50:40,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 60026 transitions. [2021-07-13 20:50:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:40,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:40,513 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:40,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:40,714 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 103 times [2021-07-13 20:50:40,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:40,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037081665] [2021-07-13 20:50:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:40,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037081665] [2021-07-13 20:50:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037081665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:40,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042933325] [2021-07-13 20:50:40,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042933325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:40,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:40,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:50:40,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184544357] [2021-07-13 20:50:40,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:40,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:40,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:40,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:40,972 INFO L87 Difference]: Start difference. First operand 15399 states and 60026 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:41,638 INFO L93 Difference]: Finished difference Result 25011 states and 91344 transitions. [2021-07-13 20:50:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:50:41,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:50:41,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:41,711 INFO L225 Difference]: With dead ends: 25011 [2021-07-13 20:50:41,711 INFO L226 Difference]: Without dead ends: 24998 [2021-07-13 20:50:41,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:50:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-07-13 20:50:42,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 15493. [2021-07-13 20:50:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15493 states, 15492 states have (on average 3.904014975471211) internal successors, (60481), 15492 states have internal predecessors, (60481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15493 states to 15493 states and 60481 transitions. [2021-07-13 20:50:42,251 INFO L78 Accepts]: Start accepts. Automaton has 15493 states and 60481 transitions. Word has length 28 [2021-07-13 20:50:42,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:42,252 INFO L482 AbstractCegarLoop]: Abstraction has 15493 states and 60481 transitions. [2021-07-13 20:50:42,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 15493 states and 60481 transitions. [2021-07-13 20:50:42,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:42,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:42,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:42,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:42,493 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:42,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:42,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-07-13 20:50:42,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:42,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753503109] [2021-07-13 20:50:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:42,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753503109] [2021-07-13 20:50:42,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753503109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:42,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303824780] [2021-07-13 20:50:42,519 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:42,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303824780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:42,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:42,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 20:50:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576378417] [2021-07-13 20:50:42,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:42,618 INFO L87 Difference]: Start difference. First operand 15493 states and 60481 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:43,314 INFO L93 Difference]: Finished difference Result 26795 states and 97004 transitions. [2021-07-13 20:50:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:50:43,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-07-13 20:50:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:43,399 INFO L225 Difference]: With dead ends: 26795 [2021-07-13 20:50:43,399 INFO L226 Difference]: Without dead ends: 26795 [2021-07-13 20:50:43,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:50:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26795 states. [2021-07-13 20:50:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26795 to 15546. [2021-07-13 20:50:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 3.900482470247668) internal successors, (60633), 15545 states have internal predecessors, (60633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:43,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 60633 transitions. [2021-07-13 20:50:43,978 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 60633 transitions. Word has length 28 [2021-07-13 20:50:43,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:43,978 INFO L482 AbstractCegarLoop]: Abstraction has 15546 states and 60633 transitions. [2021-07-13 20:50:43,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 60633 transitions. [2021-07-13 20:50:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:44,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:44,107 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:44,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:44,307 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 84 times [2021-07-13 20:50:44,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:44,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579626840] [2021-07-13 20:50:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:44,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:44,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579626840] [2021-07-13 20:50:44,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579626840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:44,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246819075] [2021-07-13 20:50:44,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:44,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 20:50:44,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246819075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:44,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:44,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:50:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224467721] [2021-07-13 20:50:44,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:44,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:44,435 INFO L87 Difference]: Start difference. First operand 15546 states and 60633 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:45,353 INFO L93 Difference]: Finished difference Result 26187 states and 97576 transitions. [2021-07-13 20:50:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:50:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:50:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:45,441 INFO L225 Difference]: With dead ends: 26187 [2021-07-13 20:50:45,441 INFO L226 Difference]: Without dead ends: 26183 [2021-07-13 20:50:45,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 489.2ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:50:45,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-07-13 20:50:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 15842. [2021-07-13 20:50:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 3.8898428129537277) internal successors, (61619), 15841 states have internal predecessors, (61619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 61619 transitions. [2021-07-13 20:50:45,979 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 61619 transitions. Word has length 28 [2021-07-13 20:50:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:45,979 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 61619 transitions. [2021-07-13 20:50:45,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 61619 transitions. [2021-07-13 20:50:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:46,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:46,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:46,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:46,217 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 105 times [2021-07-13 20:50:46,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:46,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540587793] [2021-07-13 20:50:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:46,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:46,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:46,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540587793] [2021-07-13 20:50:46,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540587793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:46,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103151353] [2021-07-13 20:50:46,246 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:46,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:50:46,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:46,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:46,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103151353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:46,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:46,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:50:46,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229993781] [2021-07-13 20:50:46,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:46,333 INFO L87 Difference]: Start difference. First operand 15842 states and 61619 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:47,019 INFO L93 Difference]: Finished difference Result 23185 states and 86238 transitions. [2021-07-13 20:50:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:50:47,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:47,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:47,086 INFO L225 Difference]: With dead ends: 23185 [2021-07-13 20:50:47,086 INFO L226 Difference]: Without dead ends: 23162 [2021-07-13 20:50:47,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:50:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23162 states. [2021-07-13 20:50:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23162 to 15987. [2021-07-13 20:50:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15987 states, 15986 states have (on average 3.90191417490304) internal successors, (62376), 15986 states have internal predecessors, (62376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15987 states to 15987 states and 62376 transitions. [2021-07-13 20:50:47,668 INFO L78 Accepts]: Start accepts. Automaton has 15987 states and 62376 transitions. Word has length 28 [2021-07-13 20:50:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:47,668 INFO L482 AbstractCegarLoop]: Abstraction has 15987 states and 62376 transitions. [2021-07-13 20:50:47,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 15987 states and 62376 transitions. [2021-07-13 20:50:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:47,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:47,702 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:47,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 20:50:47,909 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:47,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-07-13 20:50:47,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:47,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853005324] [2021-07-13 20:50:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:47,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:47,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853005324] [2021-07-13 20:50:47,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853005324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:47,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434035603] [2021-07-13 20:50:47,940 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 [2021-07-13 20:50:47,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:50:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:47,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:48,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434035603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:50:48,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238728449] [2021-07-13 20:50:48,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:48,058 INFO L87 Difference]: Start difference. First operand 15987 states and 62376 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:48,759 INFO L93 Difference]: Finished difference Result 22747 states and 83421 transitions. [2021-07-13 20:50:48,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:50:48,760 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:48,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:48,822 INFO L225 Difference]: With dead ends: 22747 [2021-07-13 20:50:48,822 INFO L226 Difference]: Without dead ends: 22747 [2021-07-13 20:50:48,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:50:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2021-07-13 20:50:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 16102. [2021-07-13 20:50:49,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16102 states, 16101 states have (on average 3.8941059561517917) internal successors, (62699), 16101 states have internal predecessors, (62699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16102 states to 16102 states and 62699 transitions. [2021-07-13 20:50:49,401 INFO L78 Accepts]: Start accepts. Automaton has 16102 states and 62699 transitions. Word has length 28 [2021-07-13 20:50:49,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:49,401 INFO L482 AbstractCegarLoop]: Abstraction has 16102 states and 62699 transitions. [2021-07-13 20:50:49,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16102 states and 62699 transitions. [2021-07-13 20:50:49,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:49,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:49,431 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 20:50:49,632 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-07-13 20:50:49,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:49,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603065533] [2021-07-13 20:50:49,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:49,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:49,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603065533] [2021-07-13 20:50:49,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603065533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:49,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231297081] [2021-07-13 20:50:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:49,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:50:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:49,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:49,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231297081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:49,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:49,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:50:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443683843] [2021-07-13 20:50:49,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:50:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:49,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:50:49,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:50:49,753 INFO L87 Difference]: Start difference. First operand 16102 states and 62699 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:50,532 INFO L93 Difference]: Finished difference Result 25248 states and 92992 transitions. [2021-07-13 20:50:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:50:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:50,609 INFO L225 Difference]: With dead ends: 25248 [2021-07-13 20:50:50,610 INFO L226 Difference]: Without dead ends: 25248 [2021-07-13 20:50:50,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:50:50,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25248 states. [2021-07-13 20:50:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25248 to 17267. [2021-07-13 20:50:50,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17267 states, 17266 states have (on average 3.875709486852774) internal successors, (66918), 17266 states have internal predecessors, (66918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:51,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17267 states to 17267 states and 66918 transitions. [2021-07-13 20:50:51,054 INFO L78 Accepts]: Start accepts. Automaton has 17267 states and 66918 transitions. Word has length 28 [2021-07-13 20:50:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:51,054 INFO L482 AbstractCegarLoop]: Abstraction has 17267 states and 66918 transitions. [2021-07-13 20:50:51,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 17267 states and 66918 transitions. [2021-07-13 20:50:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:51,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:51,085 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:51,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 20:50:51,286 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:51,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-07-13 20:50:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:51,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589476255] [2021-07-13 20:50:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:51,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589476255] [2021-07-13 20:50:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589476255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649657985] [2021-07-13 20:50:51,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:51,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:50:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:51,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649657985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:51,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:51,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:50:51,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957459416] [2021-07-13 20:50:51,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:50:51,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:51,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:50:51,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:50:51,437 INFO L87 Difference]: Start difference. First operand 17267 states and 66918 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:52,373 INFO L93 Difference]: Finished difference Result 28557 states and 103702 transitions. [2021-07-13 20:50:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:50:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-07-13 20:50:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:52,457 INFO L225 Difference]: With dead ends: 28557 [2021-07-13 20:50:52,458 INFO L226 Difference]: Without dead ends: 28557 [2021-07-13 20:50:52,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:50:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-07-13 20:50:52,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 17513. [2021-07-13 20:50:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17513 states, 17512 states have (on average 3.8901324805847417) internal successors, (68124), 17512 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17513 states to 17513 states and 68124 transitions. [2021-07-13 20:50:53,038 INFO L78 Accepts]: Start accepts. Automaton has 17513 states and 68124 transitions. Word has length 28 [2021-07-13 20:50:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:53,038 INFO L482 AbstractCegarLoop]: Abstraction has 17513 states and 68124 transitions. [2021-07-13 20:50:53,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 17513 states and 68124 transitions. [2021-07-13 20:50:53,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:53,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:53,068 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:53,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-13 20:50:53,268 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:53,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:53,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 85 times [2021-07-13 20:50:53,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:53,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50790754] [2021-07-13 20:50:53,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:53,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:53,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50790754] [2021-07-13 20:50:53,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50790754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:53,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486382915] [2021-07-13 20:50:53,301 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:53,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486382915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:53,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259336587] [2021-07-13 20:50:53,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:53,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:53,417 INFO L87 Difference]: Start difference. First operand 17513 states and 68124 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:54,979 INFO L93 Difference]: Finished difference Result 45668 states and 165537 transitions. [2021-07-13 20:50:54,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:50:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:55,144 INFO L225 Difference]: With dead ends: 45668 [2021-07-13 20:50:55,144 INFO L226 Difference]: Without dead ends: 45668 [2021-07-13 20:50:55,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 817.3ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:50:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45668 states. [2021-07-13 20:50:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45668 to 18875. [2021-07-13 20:50:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 18874 states have (on average 3.927943202288863) internal successors, (74136), 18874 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:56,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74136 transitions. [2021-07-13 20:50:56,099 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74136 transitions. Word has length 28 [2021-07-13 20:50:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:56,099 INFO L482 AbstractCegarLoop]: Abstraction has 18875 states and 74136 transitions. [2021-07-13 20:50:56,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:56,099 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74136 transitions. [2021-07-13 20:50:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:56,134 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:56,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:56,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:56,335 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 86 times [2021-07-13 20:50:56,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:56,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68828914] [2021-07-13 20:50:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:56,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:56,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68828914] [2021-07-13 20:50:56,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68828914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:56,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482741230] [2021-07-13 20:50:56,378 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:56,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:50:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:50:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:50:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:56,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482741230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:56,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:56,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:50:56,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379891551] [2021-07-13 20:50:56,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:50:56,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:50:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:50:56,498 INFO L87 Difference]: Start difference. First operand 18875 states and 74136 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:50:58,063 INFO L93 Difference]: Finished difference Result 44591 states and 162736 transitions. [2021-07-13 20:50:58,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:50:58,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:50:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:50:58,209 INFO L225 Difference]: With dead ends: 44591 [2021-07-13 20:50:58,209 INFO L226 Difference]: Without dead ends: 44591 [2021-07-13 20:50:58,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:50:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44591 states. [2021-07-13 20:50:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44591 to 18843. [2021-07-13 20:50:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 3.924848742171744) internal successors, (73952), 18842 states have internal predecessors, (73952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 73952 transitions. [2021-07-13 20:50:59,308 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 73952 transitions. Word has length 28 [2021-07-13 20:50:59,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:50:59,308 INFO L482 AbstractCegarLoop]: Abstraction has 18843 states and 73952 transitions. [2021-07-13 20:50:59,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:50:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 73952 transitions. [2021-07-13 20:50:59,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:50:59,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:50:59,342 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:50:59,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-07-13 20:50:59,549 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:50:59,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:50:59,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-07-13 20:50:59,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:50:59,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967708582] [2021-07-13 20:50:59,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:50:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:59,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:50:59,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967708582] [2021-07-13 20:50:59,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967708582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:59,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258655292] [2021-07-13 20:50:59,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:50:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:50:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:50:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:50:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:50:59,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258655292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:50:59,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:50:59,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:50:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273151511] [2021-07-13 20:50:59,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:50:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:50:59,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:50:59,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:50:59,672 INFO L87 Difference]: Start difference. First operand 18843 states and 73952 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:00,004 INFO L93 Difference]: Finished difference Result 30303 states and 117561 transitions. [2021-07-13 20:51:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:51:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 28 [2021-07-13 20:51:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:00,102 INFO L225 Difference]: With dead ends: 30303 [2021-07-13 20:51:00,102 INFO L226 Difference]: Without dead ends: 30256 [2021-07-13 20:51:00,102 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:51:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30256 states. [2021-07-13 20:51:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30256 to 24046. [2021-07-13 20:51:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 24045 states have (on average 3.9271782075275525) internal successors, (94429), 24045 states have internal predecessors, (94429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:01,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 94429 transitions. [2021-07-13 20:51:01,266 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 94429 transitions. Word has length 28 [2021-07-13 20:51:01,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:01,266 INFO L482 AbstractCegarLoop]: Abstraction has 24046 states and 94429 transitions. [2021-07-13 20:51:01,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 94429 transitions. [2021-07-13 20:51:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:01,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:01,317 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:01,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-07-13 20:51:01,533 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-07-13 20:51:01,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:01,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118332694] [2021-07-13 20:51:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:01,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118332694] [2021-07-13 20:51:01,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118332694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:01,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602535051] [2021-07-13 20:51:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:01,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:01,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:51:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:01,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602535051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:01,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:01,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 20:51:01,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397110857] [2021-07-13 20:51:01,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:01,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:01,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:01,646 INFO L87 Difference]: Start difference. First operand 24046 states and 94429 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:02,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:02,139 INFO L93 Difference]: Finished difference Result 26794 states and 102777 transitions. [2021-07-13 20:51:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:51:02,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:51:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:02,224 INFO L225 Difference]: With dead ends: 26794 [2021-07-13 20:51:02,224 INFO L226 Difference]: Without dead ends: 26794 [2021-07-13 20:51:02,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:51:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-07-13 20:51:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 23549. [2021-07-13 20:51:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23549 states, 23548 states have (on average 3.9178274163410904) internal successors, (92257), 23548 states have internal predecessors, (92257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23549 states to 23549 states and 92257 transitions. [2021-07-13 20:51:03,022 INFO L78 Accepts]: Start accepts. Automaton has 23549 states and 92257 transitions. Word has length 28 [2021-07-13 20:51:03,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:03,023 INFO L482 AbstractCegarLoop]: Abstraction has 23549 states and 92257 transitions. [2021-07-13 20:51:03,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 23549 states and 92257 transitions. [2021-07-13 20:51:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:03,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:03,068 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:03,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-07-13 20:51:03,286 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:03,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-07-13 20:51:03,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:03,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817953572] [2021-07-13 20:51:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:03,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:03,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817953572] [2021-07-13 20:51:03,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817953572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:03,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388693494] [2021-07-13 20:51:03,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:03,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:51:03,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:03,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388693494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:03,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:03,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-13 20:51:03,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710528615] [2021-07-13 20:51:03,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:51:03,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:51:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:51:03,427 INFO L87 Difference]: Start difference. First operand 23549 states and 92257 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:03,644 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:51:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:04,523 INFO L93 Difference]: Finished difference Result 36148 states and 135030 transitions. [2021-07-13 20:51:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:51:04,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-07-13 20:51:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:04,651 INFO L225 Difference]: With dead ends: 36148 [2021-07-13 20:51:04,652 INFO L226 Difference]: Without dead ends: 36148 [2021-07-13 20:51:04,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:51:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36148 states. [2021-07-13 20:51:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36148 to 23617. [2021-07-13 20:51:05,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23617 states, 23616 states have (on average 3.915989159891599) internal successors, (92480), 23616 states have internal predecessors, (92480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23617 states to 23617 states and 92480 transitions. [2021-07-13 20:51:05,431 INFO L78 Accepts]: Start accepts. Automaton has 23617 states and 92480 transitions. Word has length 28 [2021-07-13 20:51:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:05,431 INFO L482 AbstractCegarLoop]: Abstraction has 23617 states and 92480 transitions. [2021-07-13 20:51:05,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23617 states and 92480 transitions. [2021-07-13 20:51:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:05,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:05,472 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:05,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:05,672 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:05,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-07-13 20:51:05,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:05,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085733284] [2021-07-13 20:51:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:05,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085733284] [2021-07-13 20:51:05,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085733284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:05,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017877062] [2021-07-13 20:51:05,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:05,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:05,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017877062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:05,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:05,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:51:05,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606077992] [2021-07-13 20:51:05,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:05,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:05,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:05,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:05,818 INFO L87 Difference]: Start difference. First operand 23617 states and 92480 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:06,165 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:51:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:07,473 INFO L93 Difference]: Finished difference Result 46617 states and 172038 transitions. [2021-07-13 20:51:07,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:51:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:07,635 INFO L225 Difference]: With dead ends: 46617 [2021-07-13 20:51:07,635 INFO L226 Difference]: Without dead ends: 46617 [2021-07-13 20:51:07,635 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 994.5ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:51:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46617 states. [2021-07-13 20:51:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46617 to 23616. [2021-07-13 20:51:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 3.9178488248994285) internal successors, (92520), 23615 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 92520 transitions. [2021-07-13 20:51:08,750 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 92520 transitions. Word has length 28 [2021-07-13 20:51:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:08,750 INFO L482 AbstractCegarLoop]: Abstraction has 23616 states and 92520 transitions. [2021-07-13 20:51:08,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 92520 transitions. [2021-07-13 20:51:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:08,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:08,794 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:08,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:08,995 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-07-13 20:51:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283072890] [2021-07-13 20:51:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:09,029 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:09,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:09,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283072890] [2021-07-13 20:51:09,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283072890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:09,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2570180] [2021-07-13 20:51:09,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:09,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:51:09,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2570180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-07-13 20:51:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74976969] [2021-07-13 20:51:09,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:09,139 INFO L87 Difference]: Start difference. First operand 23616 states and 92520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:10,623 INFO L93 Difference]: Finished difference Result 46345 states and 171695 transitions. [2021-07-13 20:51:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:51:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:10,865 INFO L225 Difference]: With dead ends: 46345 [2021-07-13 20:51:10,865 INFO L226 Difference]: Without dead ends: 46345 [2021-07-13 20:51:10,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 875.2ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:51:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46345 states. [2021-07-13 20:51:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46345 to 23400. [2021-07-13 20:51:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 3.9111927860164966) internal successors, (91518), 23399 states have internal predecessors, (91518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 91518 transitions. [2021-07-13 20:51:11,926 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 91518 transitions. Word has length 28 [2021-07-13 20:51:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:11,926 INFO L482 AbstractCegarLoop]: Abstraction has 23400 states and 91518 transitions. [2021-07-13 20:51:11,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 91518 transitions. [2021-07-13 20:51:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:11,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:11,968 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:12,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-13 20:51:12,168 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:12,169 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-07-13 20:51:12,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:12,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746160652] [2021-07-13 20:51:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:12,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746160652] [2021-07-13 20:51:12,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746160652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:12,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237142814] [2021-07-13 20:51:12,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:12,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:51:12,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:51:12,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237142814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:12,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:12,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:51:12,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471504047] [2021-07-13 20:51:12,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:12,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:12,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:12,279 INFO L87 Difference]: Start difference. First operand 23400 states and 91518 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:12,597 INFO L93 Difference]: Finished difference Result 35770 states and 134580 transitions. [2021-07-13 20:51:12,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:51:12,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:12,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:12,862 INFO L225 Difference]: With dead ends: 35770 [2021-07-13 20:51:12,862 INFO L226 Difference]: Without dead ends: 35753 [2021-07-13 20:51:12,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:51:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35753 states. [2021-07-13 20:51:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35753 to 23671. [2021-07-13 20:51:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23671 states, 23670 states have (on average 3.9156738487536966) internal successors, (92684), 23670 states have internal predecessors, (92684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 92684 transitions. [2021-07-13 20:51:13,573 INFO L78 Accepts]: Start accepts. Automaton has 23671 states and 92684 transitions. Word has length 28 [2021-07-13 20:51:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:13,574 INFO L482 AbstractCegarLoop]: Abstraction has 23671 states and 92684 transitions. [2021-07-13 20:51:13,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 23671 states and 92684 transitions. [2021-07-13 20:51:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:13,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:13,620 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:13,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-07-13 20:51:13,820 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-07-13 20:51:13,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:13,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066388046] [2021-07-13 20:51:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066388046] [2021-07-13 20:51:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066388046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374949154] [2021-07-13 20:51:13,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:13,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:13,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:51:13,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374949154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:13,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:13,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 20:51:13,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426335893] [2021-07-13 20:51:13,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:13,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:13,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:13,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:13,930 INFO L87 Difference]: Start difference. First operand 23671 states and 92684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:14,372 INFO L93 Difference]: Finished difference Result 37952 states and 141497 transitions. [2021-07-13 20:51:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:51:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:14,506 INFO L225 Difference]: With dead ends: 37952 [2021-07-13 20:51:14,506 INFO L226 Difference]: Without dead ends: 37952 [2021-07-13 20:51:14,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 104.8ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:51:14,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37952 states. [2021-07-13 20:51:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37952 to 23340. [2021-07-13 20:51:15,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23340 states, 23339 states have (on average 3.903252067355071) internal successors, (91098), 23339 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23340 states to 23340 states and 91098 transitions. [2021-07-13 20:51:15,418 INFO L78 Accepts]: Start accepts. Automaton has 23340 states and 91098 transitions. Word has length 28 [2021-07-13 20:51:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:15,418 INFO L482 AbstractCegarLoop]: Abstraction has 23340 states and 91098 transitions. [2021-07-13 20:51:15,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 23340 states and 91098 transitions. [2021-07-13 20:51:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:15,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:15,465 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:15,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 20:51:15,665 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:15,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:15,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-07-13 20:51:15,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:15,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814421031] [2021-07-13 20:51:15,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:15,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814421031] [2021-07-13 20:51:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814421031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945324466] [2021-07-13 20:51:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:15,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:15,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:15,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:15,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:15,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945324466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:15,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:15,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:51:15,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065244033] [2021-07-13 20:51:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:51:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:51:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:51:15,813 INFO L87 Difference]: Start difference. First operand 23340 states and 91098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:16,668 INFO L93 Difference]: Finished difference Result 33275 states and 124927 transitions. [2021-07-13 20:51:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 20:51:16,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:16,790 INFO L225 Difference]: With dead ends: 33275 [2021-07-13 20:51:16,790 INFO L226 Difference]: Without dead ends: 33275 [2021-07-13 20:51:16,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:51:16,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33275 states. [2021-07-13 20:51:17,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33275 to 23388. [2021-07-13 20:51:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 3.9018258006584854) internal successors, (91252), 23387 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 91252 transitions. [2021-07-13 20:51:17,661 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 91252 transitions. Word has length 28 [2021-07-13 20:51:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:17,661 INFO L482 AbstractCegarLoop]: Abstraction has 23388 states and 91252 transitions. [2021-07-13 20:51:17,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:17,661 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 91252 transitions. [2021-07-13 20:51:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:17,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:17,701 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:17,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-13 20:51:17,901 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:17,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-07-13 20:51:17,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:17,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790440590] [2021-07-13 20:51:17,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:17,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790440590] [2021-07-13 20:51:17,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790440590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:17,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968894062] [2021-07-13 20:51:17,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:17,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:51:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:17,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:17,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:18,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968894062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:18,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:18,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:51:18,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796311519] [2021-07-13 20:51:18,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:51:18,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:51:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:51:18,028 INFO L87 Difference]: Start difference. First operand 23388 states and 91252 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:19,129 INFO L93 Difference]: Finished difference Result 34959 states and 129812 transitions. [2021-07-13 20:51:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:51:19,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:19,239 INFO L225 Difference]: With dead ends: 34959 [2021-07-13 20:51:19,240 INFO L226 Difference]: Without dead ends: 34959 [2021-07-13 20:51:19,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:51:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34959 states. [2021-07-13 20:51:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34959 to 23950. [2021-07-13 20:51:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23950 states, 23949 states have (on average 3.882625579356132) internal successors, (92985), 23949 states have internal predecessors, (92985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23950 states to 23950 states and 92985 transitions. [2021-07-13 20:51:20,126 INFO L78 Accepts]: Start accepts. Automaton has 23950 states and 92985 transitions. Word has length 28 [2021-07-13 20:51:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:20,126 INFO L482 AbstractCegarLoop]: Abstraction has 23950 states and 92985 transitions. [2021-07-13 20:51:20,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 23950 states and 92985 transitions. [2021-07-13 20:51:20,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:20,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:20,175 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:20,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-07-13 20:51:20,375 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:20,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-07-13 20:51:20,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:20,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619560294] [2021-07-13 20:51:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:20,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:20,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619560294] [2021-07-13 20:51:20,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619560294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:20,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961421659] [2021-07-13 20:51:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:20,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:20,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961421659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:20,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:20,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-13 20:51:20,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375640580] [2021-07-13 20:51:20,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:51:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:51:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:51:20,540 INFO L87 Difference]: Start difference. First operand 23950 states and 92985 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:21,515 INFO L93 Difference]: Finished difference Result 34019 states and 127355 transitions. [2021-07-13 20:51:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:51:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:21,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:21,625 INFO L225 Difference]: With dead ends: 34019 [2021-07-13 20:51:21,625 INFO L226 Difference]: Without dead ends: 34015 [2021-07-13 20:51:21,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 437.2ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:51:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2021-07-13 20:51:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 23842. [2021-07-13 20:51:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 3.885113879451365) internal successors, (92625), 23841 states have internal predecessors, (92625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 92625 transitions. [2021-07-13 20:51:22,416 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 92625 transitions. Word has length 28 [2021-07-13 20:51:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:22,416 INFO L482 AbstractCegarLoop]: Abstraction has 23842 states and 92625 transitions. [2021-07-13 20:51:22,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 92625 transitions. [2021-07-13 20:51:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:22,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:22,460 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:22,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:22,661 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:22,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-07-13 20:51:22,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:22,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488011065] [2021-07-13 20:51:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:22,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:22,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488011065] [2021-07-13 20:51:22,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488011065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:22,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968933245] [2021-07-13 20:51:22,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:22,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:51:22,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:22,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:22,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 20:51:22,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968933245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:22,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:22,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 20:51:22,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445364145] [2021-07-13 20:51:22,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:51:22,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:51:22,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:22,763 INFO L87 Difference]: Start difference. First operand 23842 states and 92625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:23,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:23,190 INFO L93 Difference]: Finished difference Result 30199 states and 113195 transitions. [2021-07-13 20:51:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 20:51:23,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-07-13 20:51:23,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:23,287 INFO L225 Difference]: With dead ends: 30199 [2021-07-13 20:51:23,287 INFO L226 Difference]: Without dead ends: 30199 [2021-07-13 20:51:23,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:51:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-07-13 20:51:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 24152. [2021-07-13 20:51:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.87718935033746) internal successors, (93638), 24151 states have internal predecessors, (93638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 93638 transitions. [2021-07-13 20:51:23,997 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 93638 transitions. Word has length 28 [2021-07-13 20:51:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:23,997 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 93638 transitions. [2021-07-13 20:51:23,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 93638 transitions. [2021-07-13 20:51:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:24,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:24,048 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:24,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-07-13 20:51:24,249 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-07-13 20:51:24,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:24,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338321679] [2021-07-13 20:51:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:24,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338321679] [2021-07-13 20:51:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338321679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746231638] [2021-07-13 20:51:24,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:24,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:51:24,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:51:24,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746231638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:24,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:24,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:51:24,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020591096] [2021-07-13 20:51:24,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:24,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:24,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:24,372 INFO L87 Difference]: Start difference. First operand 24152 states and 93638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:24,777 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:51:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:25,310 INFO L93 Difference]: Finished difference Result 35046 states and 129747 transitions. [2021-07-13 20:51:25,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:51:25,310 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:51:25,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:25,420 INFO L225 Difference]: With dead ends: 35046 [2021-07-13 20:51:25,420 INFO L226 Difference]: Without dead ends: 35046 [2021-07-13 20:51:25,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:51:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35046 states. [2021-07-13 20:51:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35046 to 25935. [2021-07-13 20:51:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.8859026760237527) internal successors, (100777), 25934 states have internal predecessors, (100777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 100777 transitions. [2021-07-13 20:51:26,289 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 100777 transitions. Word has length 28 [2021-07-13 20:51:26,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:26,289 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 100777 transitions. [2021-07-13 20:51:26,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:26,289 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 100777 transitions. [2021-07-13 20:51:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:26,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:26,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:26,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-07-13 20:51:26,538 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:26,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:26,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-07-13 20:51:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:26,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574725836] [2021-07-13 20:51:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:26,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:26,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574725836] [2021-07-13 20:51:26,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574725836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:26,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753921534] [2021-07-13 20:51:26,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:26,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:26,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:51:26,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753921534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:26,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:26,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:51:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075077490] [2021-07-13 20:51:26,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:26,653 INFO L87 Difference]: Start difference. First operand 25935 states and 100777 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:27,299 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:51:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:27,469 INFO L93 Difference]: Finished difference Result 33305 states and 125259 transitions. [2021-07-13 20:51:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:51:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:51:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:27,576 INFO L225 Difference]: With dead ends: 33305 [2021-07-13 20:51:27,576 INFO L226 Difference]: Without dead ends: 33293 [2021-07-13 20:51:27,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:51:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33293 states. [2021-07-13 20:51:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33293 to 26101. [2021-07-13 20:51:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26101 states, 26100 states have (on average 3.880842911877395) internal successors, (101290), 26100 states have internal predecessors, (101290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26101 states to 26101 states and 101290 transitions. [2021-07-13 20:51:28,549 INFO L78 Accepts]: Start accepts. Automaton has 26101 states and 101290 transitions. Word has length 28 [2021-07-13 20:51:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:28,549 INFO L482 AbstractCegarLoop]: Abstraction has 26101 states and 101290 transitions. [2021-07-13 20:51:28,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 26101 states and 101290 transitions. [2021-07-13 20:51:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:28,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:28,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:28,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:28,795 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-07-13 20:51:28,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:28,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788726684] [2021-07-13 20:51:28,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:28,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788726684] [2021-07-13 20:51:28,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788726684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777820907] [2021-07-13 20:51:28,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:28,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:28,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 20:51:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:28,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777820907] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:28,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:28,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 20:51:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076163104] [2021-07-13 20:51:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:51:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:51:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:51:28,892 INFO L87 Difference]: Start difference. First operand 26101 states and 101290 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:29,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:29,171 INFO L93 Difference]: Finished difference Result 30661 states and 116866 transitions. [2021-07-13 20:51:29,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 20:51:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-07-13 20:51:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:29,266 INFO L225 Difference]: With dead ends: 30661 [2021-07-13 20:51:29,266 INFO L226 Difference]: Without dead ends: 30661 [2021-07-13 20:51:29,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:51:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30661 states. [2021-07-13 20:51:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30661 to 27307. [2021-07-13 20:51:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27307 states, 27306 states have (on average 3.8768402548890353) internal successors, (105861), 27306 states have internal predecessors, (105861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27307 states to 27307 states and 105861 transitions. [2021-07-13 20:51:30,124 INFO L78 Accepts]: Start accepts. Automaton has 27307 states and 105861 transitions. Word has length 28 [2021-07-13 20:51:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:30,124 INFO L482 AbstractCegarLoop]: Abstraction has 27307 states and 105861 transitions. [2021-07-13 20:51:30,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 27307 states and 105861 transitions. [2021-07-13 20:51:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:30,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:30,208 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:30,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:30,425 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:30,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-07-13 20:51:30,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:30,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017115729] [2021-07-13 20:51:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:30,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:30,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:30,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017115729] [2021-07-13 20:51:30,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017115729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:30,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362675993] [2021-07-13 20:51:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:30,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:51:30,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:30,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362675993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:30,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:30,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:51:30,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751869169] [2021-07-13 20:51:30,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:30,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:30,546 INFO L87 Difference]: Start difference. First operand 27307 states and 105861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:51:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:31,437 INFO L93 Difference]: Finished difference Result 35422 states and 132065 transitions. [2021-07-13 20:51:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:51:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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 28 [2021-07-13 20:51:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:31,563 INFO L225 Difference]: With dead ends: 35422 [2021-07-13 20:51:31,563 INFO L226 Difference]: Without dead ends: 35422 [2021-07-13 20:51:31,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:51:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-07-13 20:51:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28503. [2021-07-13 20:51:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28503 states, 28502 states have (on average 3.847694898603607) internal successors, (109667), 28502 states have internal predecessors, (109667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28503 states to 28503 states and 109667 transitions. [2021-07-13 20:51:32,429 INFO L78 Accepts]: Start accepts. Automaton has 28503 states and 109667 transitions. Word has length 28 [2021-07-13 20:51:32,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:32,430 INFO L482 AbstractCegarLoop]: Abstraction has 28503 states and 109667 transitions. [2021-07-13 20:51:32,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:51:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28503 states and 109667 transitions. [2021-07-13 20:51:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:32,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:32,486 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:32,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:32,686 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-07-13 20:51:32,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:32,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276130276] [2021-07-13 20:51:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:32,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276130276] [2021-07-13 20:51:32,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276130276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002164561] [2021-07-13 20:51:32,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:32,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:32,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002164561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:32,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:32,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:51:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753547291] [2021-07-13 20:51:32,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:32,941 INFO L87 Difference]: Start difference. First operand 28503 states and 109667 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:33,543 INFO L93 Difference]: Finished difference Result 34544 states and 129722 transitions. [2021-07-13 20:51:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:51:33,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:51:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:33,651 INFO L225 Difference]: With dead ends: 34544 [2021-07-13 20:51:33,652 INFO L226 Difference]: Without dead ends: 34536 [2021-07-13 20:51:33,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:51:33,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34536 states. [2021-07-13 20:51:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34536 to 28309. [2021-07-13 20:51:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28308 states have (on average 3.853610286844708) internal successors, (109088), 28308 states have internal predecessors, (109088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 109088 transitions. [2021-07-13 20:51:34,617 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 109088 transitions. Word has length 28 [2021-07-13 20:51:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:34,618 INFO L482 AbstractCegarLoop]: Abstraction has 28309 states and 109088 transitions. [2021-07-13 20:51:34,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 109088 transitions. [2021-07-13 20:51:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:34,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:34,683 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:34,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:34,884 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:34,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-07-13 20:51:34,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:34,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070030959] [2021-07-13 20:51:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:34,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:34,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070030959] [2021-07-13 20:51:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070030959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:34,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846525028] [2021-07-13 20:51:34,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:34,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:51:34,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:34,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:35,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846525028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:35,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:35,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:51:35,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882968756] [2021-07-13 20:51:35,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:35,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:35,008 INFO L87 Difference]: Start difference. First operand 28309 states and 109088 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:35,748 INFO L93 Difference]: Finished difference Result 36390 states and 135344 transitions. [2021-07-13 20:51:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:51:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:51:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:36,010 INFO L225 Difference]: With dead ends: 36390 [2021-07-13 20:51:36,010 INFO L226 Difference]: Without dead ends: 36390 [2021-07-13 20:51:36,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:51:36,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36390 states. [2021-07-13 20:51:36,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36390 to 29319. [2021-07-13 20:51:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29319 states, 29318 states have (on average 3.831741592195921) internal successors, (112339), 29318 states have internal predecessors, (112339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29319 states to 29319 states and 112339 transitions. [2021-07-13 20:51:36,855 INFO L78 Accepts]: Start accepts. Automaton has 29319 states and 112339 transitions. Word has length 28 [2021-07-13 20:51:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:36,855 INFO L482 AbstractCegarLoop]: Abstraction has 29319 states and 112339 transitions. [2021-07-13 20:51:36,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 29319 states and 112339 transitions. [2021-07-13 20:51:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:36,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:36,910 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:37,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-07-13 20:51:37,110 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:37,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:37,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-07-13 20:51:37,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:37,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902541880] [2021-07-13 20:51:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:37,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:37,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902541880] [2021-07-13 20:51:37,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902541880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142488340] [2021-07-13 20:51:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:37,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:51:37,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:37,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:51:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:37,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142488340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:37,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:37,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:51:37,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432789571] [2021-07-13 20:51:37,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:37,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:37,215 INFO L87 Difference]: Start difference. First operand 29319 states and 112339 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:37,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:37,871 INFO L93 Difference]: Finished difference Result 35637 states and 135551 transitions. [2021-07-13 20:51:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:51:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:51:37,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:38,003 INFO L225 Difference]: With dead ends: 35637 [2021-07-13 20:51:38,003 INFO L226 Difference]: Without dead ends: 35624 [2021-07-13 20:51:38,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:51:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35624 states. [2021-07-13 20:51:38,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35624 to 34097. [2021-07-13 20:51:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34097 states, 34096 states have (on average 3.845964335992492) internal successors, (131132), 34096 states have internal predecessors, (131132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34097 states to 34097 states and 131132 transitions. [2021-07-13 20:51:38,988 INFO L78 Accepts]: Start accepts. Automaton has 34097 states and 131132 transitions. Word has length 28 [2021-07-13 20:51:38,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:38,988 INFO L482 AbstractCegarLoop]: Abstraction has 34097 states and 131132 transitions. [2021-07-13 20:51:38,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:38,988 INFO L276 IsEmpty]: Start isEmpty. Operand 34097 states and 131132 transitions. [2021-07-13 20:51:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:39,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:39,245 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:39,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:39,445 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:39,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:39,446 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-07-13 20:51:39,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:39,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050579911] [2021-07-13 20:51:39,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:39,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:39,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050579911] [2021-07-13 20:51:39,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050579911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891998118] [2021-07-13 20:51:39,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:51:39,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:39,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891998118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:39,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:39,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:51:39,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544984502] [2021-07-13 20:51:39,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:39,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:39,549 INFO L87 Difference]: Start difference. First operand 34097 states and 131132 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:39,968 INFO L93 Difference]: Finished difference Result 37254 states and 141034 transitions. [2021-07-13 20:51:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:51:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:51:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:40,093 INFO L225 Difference]: With dead ends: 37254 [2021-07-13 20:51:40,093 INFO L226 Difference]: Without dead ends: 37254 [2021-07-13 20:51:40,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:51:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37254 states. [2021-07-13 20:51:40,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37254 to 33774. [2021-07-13 20:51:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33774 states, 33773 states have (on average 3.8422704527285108) internal successors, (129765), 33773 states have internal predecessors, (129765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33774 states to 33774 states and 129765 transitions. [2021-07-13 20:51:41,098 INFO L78 Accepts]: Start accepts. Automaton has 33774 states and 129765 transitions. Word has length 28 [2021-07-13 20:51:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:41,098 INFO L482 AbstractCegarLoop]: Abstraction has 33774 states and 129765 transitions. [2021-07-13 20:51:41,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 33774 states and 129765 transitions. [2021-07-13 20:51:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:41,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:41,162 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:41,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-07-13 20:51:41,363 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:41,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:41,363 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-07-13 20:51:41,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:41,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997349442] [2021-07-13 20:51:41,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997349442] [2021-07-13 20:51:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997349442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855564141] [2021-07-13 20:51:41,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:41,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:41,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:41,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:41,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855564141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:41,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:41,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:51:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646435538] [2021-07-13 20:51:41,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:41,472 INFO L87 Difference]: Start difference. First operand 33774 states and 129765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:42,261 INFO L93 Difference]: Finished difference Result 40558 states and 152173 transitions. [2021-07-13 20:51:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:51:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:51:42,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:42,402 INFO L225 Difference]: With dead ends: 40558 [2021-07-13 20:51:42,403 INFO L226 Difference]: Without dead ends: 40550 [2021-07-13 20:51:42,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:51:42,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40550 states. [2021-07-13 20:51:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40550 to 33740. [2021-07-13 20:51:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33740 states, 33739 states have (on average 3.8426746495153976) internal successors, (129648), 33739 states have internal predecessors, (129648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33740 states to 33740 states and 129648 transitions. [2021-07-13 20:51:43,545 INFO L78 Accepts]: Start accepts. Automaton has 33740 states and 129648 transitions. Word has length 28 [2021-07-13 20:51:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:43,545 INFO L482 AbstractCegarLoop]: Abstraction has 33740 states and 129648 transitions. [2021-07-13 20:51:43,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:43,545 INFO L276 IsEmpty]: Start isEmpty. Operand 33740 states and 129648 transitions. [2021-07-13 20:51:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:43,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:43,615 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:43,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:43,816 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-07-13 20:51:43,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:43,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69829875] [2021-07-13 20:51:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:43,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:43,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69829875] [2021-07-13 20:51:43,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69829875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:43,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406101361] [2021-07-13 20:51:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:43,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:51:43,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:43,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:51:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406101361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:43,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:43,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-13 20:51:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641616271] [2021-07-13 20:51:43,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:51:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:51:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:51:43,918 INFO L87 Difference]: Start difference. First operand 33740 states and 129648 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:44,496 INFO L93 Difference]: Finished difference Result 36656 states and 139373 transitions. [2021-07-13 20:51:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:51:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 28 [2021-07-13 20:51:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:44,621 INFO L225 Difference]: With dead ends: 36656 [2021-07-13 20:51:44,622 INFO L226 Difference]: Without dead ends: 36656 [2021-07-13 20:51:44,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:51:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36656 states. [2021-07-13 20:51:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36656 to 34272. [2021-07-13 20:51:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 3.8409150593796504) internal successors, (131632), 34271 states have internal predecessors, (131632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 131632 transitions. [2021-07-13 20:51:45,635 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 131632 transitions. Word has length 28 [2021-07-13 20:51:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:45,635 INFO L482 AbstractCegarLoop]: Abstraction has 34272 states and 131632 transitions. [2021-07-13 20:51:45,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 131632 transitions. [2021-07-13 20:51:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:45,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:45,702 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:45,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-13 20:51:45,902 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:45,903 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-07-13 20:51:45,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:45,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957340499] [2021-07-13 20:51:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:45,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957340499] [2021-07-13 20:51:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957340499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140351159] [2021-07-13 20:51:45,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:45,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:51:45,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:45,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:45,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:51:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140351159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 20:51:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077005154] [2021-07-13 20:51:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:46,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:46,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:46,006 INFO L87 Difference]: Start difference. First operand 34272 states and 131632 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:46,760 INFO L93 Difference]: Finished difference Result 41443 states and 155515 transitions. [2021-07-13 20:51:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:51:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 28 [2021-07-13 20:51:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:46,920 INFO L225 Difference]: With dead ends: 41443 [2021-07-13 20:51:46,921 INFO L226 Difference]: Without dead ends: 41419 [2021-07-13 20:51:46,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 244.2ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:51:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-07-13 20:51:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 34444. [2021-07-13 20:51:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34444 states, 34443 states have (on average 3.8372383358011786) internal successors, (132166), 34443 states have internal predecessors, (132166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 132166 transitions. [2021-07-13 20:51:48,033 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 132166 transitions. Word has length 28 [2021-07-13 20:51:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:48,033 INFO L482 AbstractCegarLoop]: Abstraction has 34444 states and 132166 transitions. [2021-07-13 20:51:48,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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) [2021-07-13 20:51:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 132166 transitions. [2021-07-13 20:51:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:48,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:48,101 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:48,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 20:51:48,301 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:48,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-07-13 20:51:48,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:48,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667873419] [2021-07-13 20:51:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:48,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:48,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667873419] [2021-07-13 20:51:48,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667873419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:48,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728357809] [2021-07-13 20:51:48,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:48,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:51:48,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:48,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:51:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:48,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728357809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:48,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:48,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-13 20:51:48,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221420675] [2021-07-13 20:51:48,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:51:48,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:48,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:51:48,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:51:48,419 INFO L87 Difference]: Start difference. First operand 34444 states and 132166 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:49,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:49,086 INFO L93 Difference]: Finished difference Result 37076 states and 140866 transitions. [2021-07-13 20:51:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:51:49,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 28 [2021-07-13 20:51:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:49,215 INFO L225 Difference]: With dead ends: 37076 [2021-07-13 20:51:49,216 INFO L226 Difference]: Without dead ends: 37076 [2021-07-13 20:51:49,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:51:49,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37076 states. [2021-07-13 20:51:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37076 to 34370. [2021-07-13 20:51:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 3.8380517326660653) internal successors, (131910), 34369 states have internal predecessors, (131910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 131910 transitions. [2021-07-13 20:51:50,292 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 131910 transitions. Word has length 28 [2021-07-13 20:51:50,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:50,292 INFO L482 AbstractCegarLoop]: Abstraction has 34370 states and 131910 transitions. [2021-07-13 20:51:50,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 131910 transitions. [2021-07-13 20:51:50,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:50,358 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:50,358 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:50,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:50,559 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-07-13 20:51:50,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:50,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349261807] [2021-07-13 20:51:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:50,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:50,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349261807] [2021-07-13 20:51:50,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349261807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:50,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028622842] [2021-07-13 20:51:50,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:50,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:51:50,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:50,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:50,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028622842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:50,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:50,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 20:51:50,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927356094] [2021-07-13 20:51:50,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:51:50,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:51:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:51:50,679 INFO L87 Difference]: Start difference. First operand 34370 states and 131910 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:51:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:51,514 INFO L93 Difference]: Finished difference Result 41366 states and 155256 transitions. [2021-07-13 20:51:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:51:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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 28 [2021-07-13 20:51:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:51,657 INFO L225 Difference]: With dead ends: 41366 [2021-07-13 20:51:51,657 INFO L226 Difference]: Without dead ends: 41326 [2021-07-13 20:51:51,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:51:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2021-07-13 20:51:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 34544. [2021-07-13 20:51:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34544 states, 34543 states have (on average 3.834264539848884) internal successors, (132447), 34543 states have internal predecessors, (132447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:52,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34544 states to 34544 states and 132447 transitions. [2021-07-13 20:51:52,839 INFO L78 Accepts]: Start accepts. Automaton has 34544 states and 132447 transitions. Word has length 28 [2021-07-13 20:51:52,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:52,839 INFO L482 AbstractCegarLoop]: Abstraction has 34544 states and 132447 transitions. [2021-07-13 20:51:52,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) 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) [2021-07-13 20:51:52,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34544 states and 132447 transitions. [2021-07-13 20:51:52,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:52,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:52,912 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:53,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-07-13 20:51:53,112 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-07-13 20:51:53,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:53,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77576083] [2021-07-13 20:51:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:53,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:53,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77576083] [2021-07-13 20:51:53,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77576083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:53,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975253618] [2021-07-13 20:51:53,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:53,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975253618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:53,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:53,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:51:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368469154] [2021-07-13 20:51:53,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:53,273 INFO L87 Difference]: Start difference. First operand 34544 states and 132447 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:54,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:54,713 INFO L93 Difference]: Finished difference Result 76905 states and 284650 transitions. [2021-07-13 20:51:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:51:54,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:55,027 INFO L225 Difference]: With dead ends: 76905 [2021-07-13 20:51:55,027 INFO L226 Difference]: Without dead ends: 76905 [2021-07-13 20:51:55,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 721.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:51:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76905 states. [2021-07-13 20:51:56,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76905 to 43639. [2021-07-13 20:51:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43639 states, 43638 states have (on average 3.908336770704432) internal successors, (170552), 43638 states have internal predecessors, (170552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43639 states to 43639 states and 170552 transitions. [2021-07-13 20:51:56,910 INFO L78 Accepts]: Start accepts. Automaton has 43639 states and 170552 transitions. Word has length 28 [2021-07-13 20:51:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:51:56,910 INFO L482 AbstractCegarLoop]: Abstraction has 43639 states and 170552 transitions. [2021-07-13 20:51:56,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:56,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43639 states and 170552 transitions. [2021-07-13 20:51:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:51:57,188 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:51:57,188 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:51:57,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:57,388 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:51:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:51:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-07-13 20:51:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:51:57,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954288074] [2021-07-13 20:51:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:51:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:51:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:57,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:51:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954288074] [2021-07-13 20:51:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954288074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:57,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060802155] [2021-07-13 20:51:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:51:57,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:51:57,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:51:57,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:51:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:51:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:51:57,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060802155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:51:57,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:51:57,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:51:57,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912117861] [2021-07-13 20:51:57,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:51:57,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:51:57,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:51:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:51:57,544 INFO L87 Difference]: Start difference. First operand 43639 states and 170552 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:51:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:51:58,964 INFO L93 Difference]: Finished difference Result 76303 states and 283058 transitions. [2021-07-13 20:51:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:51:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:51:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:51:59,229 INFO L225 Difference]: With dead ends: 76303 [2021-07-13 20:51:59,230 INFO L226 Difference]: Without dead ends: 76303 [2021-07-13 20:51:59,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:51:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76303 states. [2021-07-13 20:52:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76303 to 43636. [2021-07-13 20:52:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43636 states, 43635 states have (on average 3.908284633894809) internal successors, (170538), 43635 states have internal predecessors, (170538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43636 states to 43636 states and 170538 transitions. [2021-07-13 20:52:00,946 INFO L78 Accepts]: Start accepts. Automaton has 43636 states and 170538 transitions. Word has length 28 [2021-07-13 20:52:00,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:00,946 INFO L482 AbstractCegarLoop]: Abstraction has 43636 states and 170538 transitions. [2021-07-13 20:52:00,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:00,946 INFO L276 IsEmpty]: Start isEmpty. Operand 43636 states and 170538 transitions. [2021-07-13 20:52:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:01,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:01,024 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:01,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:01,225 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-07-13 20:52:01,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:01,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214260152] [2021-07-13 20:52:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:01,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214260152] [2021-07-13 20:52:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214260152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:01,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308532881] [2021-07-13 20:52:01,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:01,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:52:01,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308532881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:01,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:01,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:52:01,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685156403] [2021-07-13 20:52:01,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:52:01,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:52:01,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:52:01,365 INFO L87 Difference]: Start difference. First operand 43636 states and 170538 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:01,605 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:52:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:02,917 INFO L93 Difference]: Finished difference Result 70919 states and 264966 transitions. [2021-07-13 20:52:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:52:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:52:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:03,202 INFO L225 Difference]: With dead ends: 70919 [2021-07-13 20:52:03,203 INFO L226 Difference]: Without dead ends: 70919 [2021-07-13 20:52:03,203 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 727.3ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:52:03,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70919 states. [2021-07-13 20:52:04,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70919 to 43660. [2021-07-13 20:52:04,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.9085182894706705) internal successors, (170642), 43659 states have internal predecessors, (170642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170642 transitions. [2021-07-13 20:52:05,136 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170642 transitions. Word has length 28 [2021-07-13 20:52:05,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:05,136 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170642 transitions. [2021-07-13 20:52:05,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170642 transitions. [2021-07-13 20:52:05,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:05,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:05,226 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:05,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-07-13 20:52:05,426 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-07-13 20:52:05,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:05,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399714377] [2021-07-13 20:52:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:05,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399714377] [2021-07-13 20:52:05,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399714377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:05,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237127720] [2021-07-13 20:52:05,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:05,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:52:05,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:05,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237127720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:05,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:05,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:52:05,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268942856] [2021-07-13 20:52:05,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:52:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:52:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:52:05,565 INFO L87 Difference]: Start difference. First operand 43660 states and 170642 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:06,006 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:52:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:07,054 INFO L93 Difference]: Finished difference Result 70043 states and 262701 transitions. [2021-07-13 20:52:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:52:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:52:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:07,363 INFO L225 Difference]: With dead ends: 70043 [2021-07-13 20:52:07,363 INFO L226 Difference]: Without dead ends: 70035 [2021-07-13 20:52:07,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:52:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70035 states. [2021-07-13 20:52:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70035 to 43660. [2021-07-13 20:52:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.908380860761813) internal successors, (170636), 43659 states have internal predecessors, (170636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170636 transitions. [2021-07-13 20:52:09,396 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170636 transitions. Word has length 28 [2021-07-13 20:52:09,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:09,396 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170636 transitions. [2021-07-13 20:52:09,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:09,396 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170636 transitions. [2021-07-13 20:52:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:09,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:09,490 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:09,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:09,690 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:09,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-07-13 20:52:09,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:09,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895151339] [2021-07-13 20:52:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:09,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:09,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895151339] [2021-07-13 20:52:09,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895151339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:09,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349027476] [2021-07-13 20:52:09,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:09,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:52:09,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:09,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349027476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:09,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:09,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:52:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548255392] [2021-07-13 20:52:09,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:52:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:52:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:52:09,838 INFO L87 Difference]: Start difference. First operand 43660 states and 170636 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:11,396 INFO L93 Difference]: Finished difference Result 69550 states and 261394 transitions. [2021-07-13 20:52:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:52:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:52:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:11,693 INFO L225 Difference]: With dead ends: 69550 [2021-07-13 20:52:11,693 INFO L226 Difference]: Without dead ends: 69550 [2021-07-13 20:52:11,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 570.4ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:52:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69550 states. [2021-07-13 20:52:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69550 to 43668. [2021-07-13 20:52:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908443446996588) internal successors, (170670), 43667 states have internal predecessors, (170670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170670 transitions. [2021-07-13 20:52:13,997 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170670 transitions. Word has length 28 [2021-07-13 20:52:13,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:13,998 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170670 transitions. [2021-07-13 20:52:13,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170670 transitions. [2021-07-13 20:52:14,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:14,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:14,086 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:14,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-07-13 20:52:14,301 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:14,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:14,301 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-07-13 20:52:14,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:14,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162170512] [2021-07-13 20:52:14,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:14,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:14,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162170512] [2021-07-13 20:52:14,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162170512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:14,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085169338] [2021-07-13 20:52:14,331 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:14,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:52:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:14,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:14,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085169338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:14,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:14,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:52:14,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003275484] [2021-07-13 20:52:14,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:52:14,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:14,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:52:14,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:52:14,897 INFO L87 Difference]: Start difference. First operand 43668 states and 170670 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:16,475 INFO L93 Difference]: Finished difference Result 69317 states and 260810 transitions. [2021-07-13 20:52:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:52:16,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:52:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:16,757 INFO L225 Difference]: With dead ends: 69317 [2021-07-13 20:52:16,757 INFO L226 Difference]: Without dead ends: 69309 [2021-07-13 20:52:16,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:52:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69309 states. [2021-07-13 20:52:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69309 to 43668. [2021-07-13 20:52:18,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908397645819498) internal successors, (170668), 43667 states have internal predecessors, (170668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170668 transitions. [2021-07-13 20:52:19,094 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170668 transitions. Word has length 28 [2021-07-13 20:52:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:19,094 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170668 transitions. [2021-07-13 20:52:19,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170668 transitions. [2021-07-13 20:52:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:19,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:19,176 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-07-13 20:52:19,376 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-07-13 20:52:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020703360] [2021-07-13 20:52:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:19,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020703360] [2021-07-13 20:52:19,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020703360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:19,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517902889] [2021-07-13 20:52:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:19,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:19,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517902889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:19,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:19,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:52:19,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919938658] [2021-07-13 20:52:19,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:19,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:19,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:19,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:19,506 INFO L87 Difference]: Start difference. First operand 43668 states and 170668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:21,064 INFO L93 Difference]: Finished difference Result 68845 states and 257637 transitions. [2021-07-13 20:52:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-07-13 20:52:21,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:21,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:21,341 INFO L225 Difference]: With dead ends: 68845 [2021-07-13 20:52:21,341 INFO L226 Difference]: Without dead ends: 68845 [2021-07-13 20:52:21,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:52:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68845 states. [2021-07-13 20:52:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68845 to 46904. [2021-07-13 20:52:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46904 states, 46903 states have (on average 3.911754045583438) internal successors, (183473), 46903 states have internal predecessors, (183473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46904 states to 46904 states and 183473 transitions. [2021-07-13 20:52:23,376 INFO L78 Accepts]: Start accepts. Automaton has 46904 states and 183473 transitions. Word has length 28 [2021-07-13 20:52:23,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:23,376 INFO L482 AbstractCegarLoop]: Abstraction has 46904 states and 183473 transitions. [2021-07-13 20:52:23,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46904 states and 183473 transitions. [2021-07-13 20:52:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:23,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:23,478 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:23,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-07-13 20:52:23,678 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-07-13 20:52:23,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:23,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160213193] [2021-07-13 20:52:23,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:23,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:23,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160213193] [2021-07-13 20:52:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160213193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:23,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402547366] [2021-07-13 20:52:23,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:23,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:23,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:23,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:23,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402547366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:23,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:23,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:52:23,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096606096] [2021-07-13 20:52:23,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:23,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:23,805 INFO L87 Difference]: Start difference. First operand 46904 states and 183473 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:24,714 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 20:52:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:25,110 INFO L93 Difference]: Finished difference Result 68346 states and 256324 transitions. [2021-07-13 20:52:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:52:25,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:25,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:25,370 INFO L225 Difference]: With dead ends: 68346 [2021-07-13 20:52:25,370 INFO L226 Difference]: Without dead ends: 68338 [2021-07-13 20:52:25,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 654.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:52:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2021-07-13 20:52:27,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 46598. [2021-07-13 20:52:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46598 states, 46597 states have (on average 3.917119127840848) internal successors, (182526), 46597 states have internal predecessors, (182526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:27,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46598 states to 46598 states and 182526 transitions. [2021-07-13 20:52:27,381 INFO L78 Accepts]: Start accepts. Automaton has 46598 states and 182526 transitions. Word has length 28 [2021-07-13 20:52:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:27,381 INFO L482 AbstractCegarLoop]: Abstraction has 46598 states and 182526 transitions. [2021-07-13 20:52:27,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 46598 states and 182526 transitions. [2021-07-13 20:52:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:27,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:27,474 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:27,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:27,675 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-07-13 20:52:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:27,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780342755] [2021-07-13 20:52:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:27,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:27,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780342755] [2021-07-13 20:52:27,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780342755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:27,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940560643] [2021-07-13 20:52:27,706 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:52:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940560643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:27,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:27,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-07-13 20:52:27,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224783105] [2021-07-13 20:52:27,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:27,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:27,806 INFO L87 Difference]: Start difference. First operand 46598 states and 182526 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:28,054 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 20:52:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:29,190 INFO L93 Difference]: Finished difference Result 66749 states and 251892 transitions. [2021-07-13 20:52:29,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:52:29,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:29,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:29,451 INFO L225 Difference]: With dead ends: 66749 [2021-07-13 20:52:29,451 INFO L226 Difference]: Without dead ends: 66725 [2021-07-13 20:52:29,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:52:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66725 states. [2021-07-13 20:52:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66725 to 46494. [2021-07-13 20:52:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46493 states have (on average 3.9171058008732498) internal successors, (182118), 46493 states have internal predecessors, (182118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 182118 transitions. [2021-07-13 20:52:31,401 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 182118 transitions. Word has length 28 [2021-07-13 20:52:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:31,401 INFO L482 AbstractCegarLoop]: Abstraction has 46494 states and 182118 transitions. [2021-07-13 20:52:31,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 182118 transitions. [2021-07-13 20:52:31,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:31,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:31,494 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:31,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:31,705 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-07-13 20:52:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:31,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461281129] [2021-07-13 20:52:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:52:31,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461281129] [2021-07-13 20:52:31,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461281129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817186315] [2021-07-13 20:52:31,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:31,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:52:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817186315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:31,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:52:31,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066421489] [2021-07-13 20:52:31,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:52:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:52:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:52:31,860 INFO L87 Difference]: Start difference. First operand 46494 states and 182118 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:33,201 INFO L93 Difference]: Finished difference Result 67947 states and 255225 transitions. [2021-07-13 20:52:33,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:52:33,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:52:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:33,502 INFO L225 Difference]: With dead ends: 67947 [2021-07-13 20:52:33,502 INFO L226 Difference]: Without dead ends: 67947 [2021-07-13 20:52:33,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:52:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-07-13 20:52:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 46590. [2021-07-13 20:52:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 3.9157741097684005) internal successors, (182432), 46589 states have internal predecessors, (182432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 182432 transitions. [2021-07-13 20:52:35,374 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 182432 transitions. Word has length 28 [2021-07-13 20:52:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:35,374 INFO L482 AbstractCegarLoop]: Abstraction has 46590 states and 182432 transitions. [2021-07-13 20:52:35,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 182432 transitions. [2021-07-13 20:52:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:35,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:35,469 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:35,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:35,670 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-07-13 20:52:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:35,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915388281] [2021-07-13 20:52:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:52:35,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915388281] [2021-07-13 20:52:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915388281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15266620] [2021-07-13 20:52:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:35,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:52:35,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:36,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15266620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:36,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:36,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-07-13 20:52:36,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580801623] [2021-07-13 20:52:36,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:52:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:52:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:52:36,027 INFO L87 Difference]: Start difference. First operand 46590 states and 182432 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:37,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:37,360 INFO L93 Difference]: Finished difference Result 67507 states and 253969 transitions. [2021-07-13 20:52:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 20:52:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-07-13 20:52:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:37,655 INFO L225 Difference]: With dead ends: 67507 [2021-07-13 20:52:37,655 INFO L226 Difference]: Without dead ends: 67499 [2021-07-13 20:52:37,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:52:37,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67499 states. [2021-07-13 20:52:39,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67499 to 46522. [2021-07-13 20:52:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46522 states, 46521 states have (on average 3.916940736441607) internal successors, (182220), 46521 states have internal predecessors, (182220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46522 states to 46522 states and 182220 transitions. [2021-07-13 20:52:39,609 INFO L78 Accepts]: Start accepts. Automaton has 46522 states and 182220 transitions. Word has length 28 [2021-07-13 20:52:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:39,609 INFO L482 AbstractCegarLoop]: Abstraction has 46522 states and 182220 transitions. [2021-07-13 20:52:39,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 46522 states and 182220 transitions. [2021-07-13 20:52:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:39,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:39,696 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:39,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:39,909 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-07-13 20:52:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:39,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858368875] [2021-07-13 20:52:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:52:39,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:39,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858368875] [2021-07-13 20:52:39,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858368875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:39,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682285776] [2021-07-13 20:52:39,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:39,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:52:39,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:39,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682285776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:40,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:40,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-07-13 20:52:40,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280292202] [2021-07-13 20:52:40,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:52:40,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:40,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:52:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:52:40,040 INFO L87 Difference]: Start difference. First operand 46522 states and 182220 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:40,784 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:52:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:41,127 INFO L93 Difference]: Finished difference Result 66238 states and 250458 transitions. [2021-07-13 20:52:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:52:41,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-07-13 20:52:41,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:41,376 INFO L225 Difference]: With dead ends: 66238 [2021-07-13 20:52:41,376 INFO L226 Difference]: Without dead ends: 66214 [2021-07-13 20:52:41,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:52:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66214 states. [2021-07-13 20:52:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66214 to 46498. [2021-07-13 20:52:43,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46498 states, 46497 states have (on average 3.9170699184893647) internal successors, (182132), 46497 states have internal predecessors, (182132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46498 states to 46498 states and 182132 transitions. [2021-07-13 20:52:43,180 INFO L78 Accepts]: Start accepts. Automaton has 46498 states and 182132 transitions. Word has length 28 [2021-07-13 20:52:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:43,180 INFO L482 AbstractCegarLoop]: Abstraction has 46498 states and 182132 transitions. [2021-07-13 20:52:43,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-07-13 20:52:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 46498 states and 182132 transitions. [2021-07-13 20:52:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:43,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:43,267 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:43,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-07-13 20:52:43,468 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:43,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-07-13 20:52:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:43,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996502322] [2021-07-13 20:52:43,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:43,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:43,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996502322] [2021-07-13 20:52:43,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996502322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:43,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933417471] [2021-07-13 20:52:43,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:43,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:43,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933417471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:43,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:43,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:52:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685265117] [2021-07-13 20:52:43,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:43,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:43,597 INFO L87 Difference]: Start difference. First operand 46498 states and 182132 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:45,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:45,480 INFO L93 Difference]: Finished difference Result 69780 states and 260558 transitions. [2021-07-13 20:52:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:52:45,481 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:45,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:45,772 INFO L225 Difference]: With dead ends: 69780 [2021-07-13 20:52:45,772 INFO L226 Difference]: Without dead ends: 69780 [2021-07-13 20:52:45,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:52:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69780 states. [2021-07-13 20:52:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69780 to 51268. [2021-07-13 20:52:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51268 states, 51267 states have (on average 3.8675756334484173) internal successors, (198279), 51267 states have internal predecessors, (198279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51268 states to 51268 states and 198279 transitions. [2021-07-13 20:52:47,917 INFO L78 Accepts]: Start accepts. Automaton has 51268 states and 198279 transitions. Word has length 28 [2021-07-13 20:52:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:47,917 INFO L482 AbstractCegarLoop]: Abstraction has 51268 states and 198279 transitions. [2021-07-13 20:52:47,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 51268 states and 198279 transitions. [2021-07-13 20:52:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:48,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:48,025 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:48,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:48,229 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-07-13 20:52:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515453282] [2021-07-13 20:52:48,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:48,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:48,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515453282] [2021-07-13 20:52:48,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515453282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:48,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595633693] [2021-07-13 20:52:48,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:48,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:52:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:48,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:48,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:48,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595633693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:48,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:48,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:52:48,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226754784] [2021-07-13 20:52:48,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:48,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:48,353 INFO L87 Difference]: Start difference. First operand 51268 states and 198279 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:50,100 INFO L93 Difference]: Finished difference Result 68981 states and 258379 transitions. [2021-07-13 20:52:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:52:50,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:50,387 INFO L225 Difference]: With dead ends: 68981 [2021-07-13 20:52:50,387 INFO L226 Difference]: Without dead ends: 68973 [2021-07-13 20:52:50,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 850.0ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 20:52:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68973 states. [2021-07-13 20:52:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68973 to 50106. [2021-07-13 20:52:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50106 states, 50105 states have (on average 3.885001496856601) internal successors, (194658), 50105 states have internal predecessors, (194658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:52,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50106 states to 50106 states and 194658 transitions. [2021-07-13 20:52:52,599 INFO L78 Accepts]: Start accepts. Automaton has 50106 states and 194658 transitions. Word has length 28 [2021-07-13 20:52:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:52,599 INFO L482 AbstractCegarLoop]: Abstraction has 50106 states and 194658 transitions. [2021-07-13 20:52:52,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 50106 states and 194658 transitions. [2021-07-13 20:52:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:52,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:52,706 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:52,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-07-13 20:52:52,906 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-07-13 20:52:52,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:52,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433139179] [2021-07-13 20:52:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:52,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433139179] [2021-07-13 20:52:52,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433139179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:52,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573011028] [2021-07-13 20:52:52,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:52,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:52:52,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:53,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573011028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:53,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:53,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:52:53,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508399993] [2021-07-13 20:52:53,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:53,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:53,039 INFO L87 Difference]: Start difference. First operand 50106 states and 194658 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:54,605 INFO L93 Difference]: Finished difference Result 67179 states and 253388 transitions. [2021-07-13 20:52:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:52:54,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:54,892 INFO L225 Difference]: With dead ends: 67179 [2021-07-13 20:52:54,892 INFO L226 Difference]: Without dead ends: 67155 [2021-07-13 20:52:54,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 546.9ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:52:54,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67155 states. [2021-07-13 20:52:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67155 to 50086. [2021-07-13 20:52:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.883278426674653) internal successors, (194494), 50085 states have internal predecessors, (194494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194494 transitions. [2021-07-13 20:52:57,101 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194494 transitions. Word has length 28 [2021-07-13 20:52:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:52:57,101 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194494 transitions. [2021-07-13 20:52:57,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194494 transitions. [2021-07-13 20:52:57,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:52:57,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:52:57,217 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:52:57,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:52:57,418 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:52:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:52:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-07-13 20:52:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:52:57,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771618276] [2021-07-13 20:52:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:52:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:52:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:57,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:52:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771618276] [2021-07-13 20:52:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771618276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857573663] [2021-07-13 20:52:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:52:57,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:52:57,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:52:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:52:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:52:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:52:57,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857573663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:52:57,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:52:57,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 20:52:57,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577565625] [2021-07-13 20:52:57,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:52:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:52:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:52:57,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:52:57,544 INFO L87 Difference]: Start difference. First operand 50086 states and 194494 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:52:58,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:52:58,892 INFO L93 Difference]: Finished difference Result 68547 states and 257187 transitions. [2021-07-13 20:52:58,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:52:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:52:58,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:52:59,164 INFO L225 Difference]: With dead ends: 68547 [2021-07-13 20:52:59,164 INFO L226 Difference]: Without dead ends: 68507 [2021-07-13 20:52:59,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 660.8ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:52:59,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68507 states. [2021-07-13 20:53:00,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68507 to 50240. [2021-07-13 20:53:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50240 states, 50239 states have (on average 3.882621071279285) internal successors, (195059), 50239 states have internal predecessors, (195059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50240 states to 50240 states and 195059 transitions. [2021-07-13 20:53:01,238 INFO L78 Accepts]: Start accepts. Automaton has 50240 states and 195059 transitions. Word has length 28 [2021-07-13 20:53:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 50240 states and 195059 transitions. [2021-07-13 20:53:01,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50240 states and 195059 transitions. [2021-07-13 20:53:01,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:01,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:01,613 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:01,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 20:53:01,828 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:01,829 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-07-13 20:53:01,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:01,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631118166] [2021-07-13 20:53:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:01,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:01,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631118166] [2021-07-13 20:53:01,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631118166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:01,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321402383] [2021-07-13 20:53:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:01,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:53:01,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:01,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:02,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321402383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:02,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:02,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:53:02,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383702812] [2021-07-13 20:53:02,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:53:02,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:02,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:53:02,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:53:02,027 INFO L87 Difference]: Start difference. First operand 50240 states and 195059 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:03,754 INFO L93 Difference]: Finished difference Result 67665 states and 254567 transitions. [2021-07-13 20:53:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:53:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 28 [2021-07-13 20:53:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:04,042 INFO L225 Difference]: With dead ends: 67665 [2021-07-13 20:53:04,042 INFO L226 Difference]: Without dead ends: 67665 [2021-07-13 20:53:04,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 939.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:53:04,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-07-13 20:53:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 51145. [2021-07-13 20:53:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 51144 states have (on average 3.8739637103081495) internal successors, (198130), 51144 states have internal predecessors, (198130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 198130 transitions. [2021-07-13 20:53:06,150 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 198130 transitions. Word has length 28 [2021-07-13 20:53:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:06,150 INFO L482 AbstractCegarLoop]: Abstraction has 51145 states and 198130 transitions. [2021-07-13 20:53:06,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:06,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 198130 transitions. [2021-07-13 20:53:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:06,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:06,266 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:06,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-07-13 20:53:06,466 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:06,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-07-13 20:53:06,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:06,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800285658] [2021-07-13 20:53:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:06,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800285658] [2021-07-13 20:53:06,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800285658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312200814] [2021-07-13 20:53:06,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:06,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:53:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:06,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312200814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:06,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:06,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:53:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817631254] [2021-07-13 20:53:06,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:53:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:53:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:53:06,841 INFO L87 Difference]: Start difference. First operand 51145 states and 198130 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:08,285 INFO L93 Difference]: Finished difference Result 67040 states and 252804 transitions. [2021-07-13 20:53:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:53:08,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 28 [2021-07-13 20:53:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:08,563 INFO L225 Difference]: With dead ends: 67040 [2021-07-13 20:53:08,563 INFO L226 Difference]: Without dead ends: 67032 [2021-07-13 20:53:08,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 847.8ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:53:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67032 states. [2021-07-13 20:53:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67032 to 51069. [2021-07-13 20:53:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 3.875107699537871) internal successors, (197894), 51068 states have internal predecessors, (197894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 197894 transitions. [2021-07-13 20:53:10,580 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 197894 transitions. Word has length 28 [2021-07-13 20:53:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:10,580 INFO L482 AbstractCegarLoop]: Abstraction has 51069 states and 197894 transitions. [2021-07-13 20:53:10,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 197894 transitions. [2021-07-13 20:53:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:10,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:10,685 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:10,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 20:53:10,886 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-07-13 20:53:10,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:10,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187491651] [2021-07-13 20:53:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:10,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:10,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187491651] [2021-07-13 20:53:10,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187491651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:10,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684108479] [2021-07-13 20:53:10,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684108479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:11,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:11,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:11,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375112448] [2021-07-13 20:53:11,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:11,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:11,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:11,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:11,027 INFO L87 Difference]: Start difference. First operand 51069 states and 197894 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:11,569 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:53:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:12,382 INFO L93 Difference]: Finished difference Result 66517 states and 251558 transitions. [2021-07-13 20:53:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:53:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:53:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:12,837 INFO L225 Difference]: With dead ends: 66517 [2021-07-13 20:53:12,838 INFO L226 Difference]: Without dead ends: 66493 [2021-07-13 20:53:12,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 717.2ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:53:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66493 states. [2021-07-13 20:53:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66493 to 51055. [2021-07-13 20:53:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51055 states, 51054 states have (on average 3.8750930387432914) internal successors, (197839), 51054 states have internal predecessors, (197839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51055 states to 51055 states and 197839 transitions. [2021-07-13 20:53:15,036 INFO L78 Accepts]: Start accepts. Automaton has 51055 states and 197839 transitions. Word has length 28 [2021-07-13 20:53:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:15,036 INFO L482 AbstractCegarLoop]: Abstraction has 51055 states and 197839 transitions. [2021-07-13 20:53:15,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51055 states and 197839 transitions. [2021-07-13 20:53:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:15,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:15,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:15,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:15,351 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-07-13 20:53:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:15,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044073982] [2021-07-13 20:53:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:15,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044073982] [2021-07-13 20:53:15,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044073982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:15,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177346445] [2021-07-13 20:53:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:53:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:15,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:15,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177346445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:15,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:15,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 20:53:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570919060] [2021-07-13 20:53:15,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:53:15,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:15,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:53:15,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:53:15,482 INFO L87 Difference]: Start difference. First operand 51055 states and 197839 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:16,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:16,800 INFO L93 Difference]: Finished difference Result 66299 states and 250865 transitions. [2021-07-13 20:53:16,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:53:16,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-07-13 20:53:16,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:17,074 INFO L225 Difference]: With dead ends: 66299 [2021-07-13 20:53:17,074 INFO L226 Difference]: Without dead ends: 66259 [2021-07-13 20:53:17,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:53:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66259 states. [2021-07-13 20:53:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66259 to 51404. [2021-07-13 20:53:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 51403 states have (on average 3.87658307880863) internal successors, (199268), 51403 states have internal predecessors, (199268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 199268 transitions. [2021-07-13 20:53:19,159 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 199268 transitions. Word has length 28 [2021-07-13 20:53:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:19,159 INFO L482 AbstractCegarLoop]: Abstraction has 51404 states and 199268 transitions. [2021-07-13 20:53:19,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 199268 transitions. [2021-07-13 20:53:19,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:19,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:19,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:19,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:19,475 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:19,475 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-07-13 20:53:19,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:19,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644909757] [2021-07-13 20:53:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:19,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644909757] [2021-07-13 20:53:19,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644909757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:19,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716280945] [2021-07-13 20:53:19,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:53:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:20,071 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-07-13 20:53:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716280945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:20,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:20,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104452433] [2021-07-13 20:53:20,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:20,102 INFO L87 Difference]: Start difference. First operand 51404 states and 199268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:21,804 INFO L93 Difference]: Finished difference Result 80562 states and 301306 transitions. [2021-07-13 20:53:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:53:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:53:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:22,151 INFO L225 Difference]: With dead ends: 80562 [2021-07-13 20:53:22,152 INFO L226 Difference]: Without dead ends: 80562 [2021-07-13 20:53:22,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1047.0ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:53:22,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80562 states. [2021-07-13 20:53:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80562 to 52570. [2021-07-13 20:53:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52570 states, 52569 states have (on average 3.888660617474177) internal successors, (204423), 52569 states have internal predecessors, (204423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52570 states to 52570 states and 204423 transitions. [2021-07-13 20:53:24,724 INFO L78 Accepts]: Start accepts. Automaton has 52570 states and 204423 transitions. Word has length 28 [2021-07-13 20:53:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:24,724 INFO L482 AbstractCegarLoop]: Abstraction has 52570 states and 204423 transitions. [2021-07-13 20:53:24,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52570 states and 204423 transitions. [2021-07-13 20:53:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:25,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:25,451 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:25,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:25,652 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-07-13 20:53:25,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:25,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717253115] [2021-07-13 20:53:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:25,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717253115] [2021-07-13 20:53:25,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717253115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601023792] [2021-07-13 20:53:25,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:25,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:53:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601023792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:25,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584762876] [2021-07-13 20:53:25,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:25,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:25,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:25,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:25,821 INFO L87 Difference]: Start difference. First operand 52570 states and 204423 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:27,465 INFO L93 Difference]: Finished difference Result 73577 states and 279250 transitions. [2021-07-13 20:53:27,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:53:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:53:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:27,781 INFO L225 Difference]: With dead ends: 73577 [2021-07-13 20:53:27,781 INFO L226 Difference]: Without dead ends: 73577 [2021-07-13 20:53:27,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 550.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:53:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73577 states. [2021-07-13 20:53:29,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73577 to 52600. [2021-07-13 20:53:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52600 states, 52599 states have (on average 3.888476967242723) internal successors, (204530), 52599 states have internal predecessors, (204530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:29,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52600 states to 52600 states and 204530 transitions. [2021-07-13 20:53:29,952 INFO L78 Accepts]: Start accepts. Automaton has 52600 states and 204530 transitions. Word has length 28 [2021-07-13 20:53:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 52600 states and 204530 transitions. [2021-07-13 20:53:29,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 52600 states and 204530 transitions. [2021-07-13 20:53:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:30,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:30,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:30,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:30,262 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-07-13 20:53:30,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:30,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948128729] [2021-07-13 20:53:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:30,489 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 20:53:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:30,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948128729] [2021-07-13 20:53:30,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948128729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775801871] [2021-07-13 20:53:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:30,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:53:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:30,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775801871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:30,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:30,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:53:30,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562795916] [2021-07-13 20:53:30,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:53:30,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:53:30,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:53:30,658 INFO L87 Difference]: Start difference. First operand 52600 states and 204530 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:32,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:32,416 INFO L93 Difference]: Finished difference Result 74613 states and 282201 transitions. [2021-07-13 20:53:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:53:32,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 28 [2021-07-13 20:53:32,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:32,734 INFO L225 Difference]: With dead ends: 74613 [2021-07-13 20:53:32,734 INFO L226 Difference]: Without dead ends: 74613 [2021-07-13 20:53:32,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:53:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74613 states. [2021-07-13 20:53:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74613 to 52864. [2021-07-13 20:53:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52864 states, 52863 states have (on average 3.8852883869625257) internal successors, (205388), 52863 states have internal predecessors, (205388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52864 states to 52864 states and 205388 transitions. [2021-07-13 20:53:35,091 INFO L78 Accepts]: Start accepts. Automaton has 52864 states and 205388 transitions. Word has length 28 [2021-07-13 20:53:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:35,091 INFO L482 AbstractCegarLoop]: Abstraction has 52864 states and 205388 transitions. [2021-07-13 20:53:35,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:35,092 INFO L276 IsEmpty]: Start isEmpty. Operand 52864 states and 205388 transitions. [2021-07-13 20:53:35,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:35,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:35,201 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:35,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:35,402 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-07-13 20:53:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607736941] [2021-07-13 20:53:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:35,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:35,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607736941] [2021-07-13 20:53:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607736941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:35,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677251784] [2021-07-13 20:53:35,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:35,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:53:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:35,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:35,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677251784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:35,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:35,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 20:53:35,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564879506] [2021-07-13 20:53:35,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 20:53:35,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:35,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 20:53:35,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:53:35,558 INFO L87 Difference]: Start difference. First operand 52864 states and 205388 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:37,182 INFO L93 Difference]: Finished difference Result 73622 states and 279382 transitions. [2021-07-13 20:53:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:53:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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 28 [2021-07-13 20:53:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:37,695 INFO L225 Difference]: With dead ends: 73622 [2021-07-13 20:53:37,695 INFO L226 Difference]: Without dead ends: 73618 [2021-07-13 20:53:37,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 851.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:53:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73618 states. [2021-07-13 20:53:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73618 to 52500. [2021-07-13 20:53:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52499 states have (on average 3.8886835939732185) internal successors, (204152), 52499 states have internal predecessors, (204152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 204152 transitions. [2021-07-13 20:53:39,884 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 204152 transitions. Word has length 28 [2021-07-13 20:53:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:39,884 INFO L482 AbstractCegarLoop]: Abstraction has 52500 states and 204152 transitions. [2021-07-13 20:53:39,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) 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) [2021-07-13 20:53:39,884 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 204152 transitions. [2021-07-13 20:53:39,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:39,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:39,992 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:40,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-07-13 20:53:40,193 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:40,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-07-13 20:53:40,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:40,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660832405] [2021-07-13 20:53:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:40,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660832405] [2021-07-13 20:53:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660832405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:40,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430822766] [2021-07-13 20:53:40,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:40,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430822766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:40,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:40,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:40,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577522755] [2021-07-13 20:53:40,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:40,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:40,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:40,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:40,338 INFO L87 Difference]: Start difference. First operand 52500 states and 204152 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:41,579 INFO L93 Difference]: Finished difference Result 67618 states and 258391 transitions. [2021-07-13 20:53:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:53:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:53:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:41,861 INFO L225 Difference]: With dead ends: 67618 [2021-07-13 20:53:41,861 INFO L226 Difference]: Without dead ends: 67618 [2021-07-13 20:53:41,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 440.5ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:53:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67618 states. [2021-07-13 20:53:43,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67618 to 52516. [2021-07-13 20:53:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52516 states, 52515 states have (on average 3.8903170522707797) internal successors, (204300), 52515 states have internal predecessors, (204300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52516 states to 52516 states and 204300 transitions. [2021-07-13 20:53:43,952 INFO L78 Accepts]: Start accepts. Automaton has 52516 states and 204300 transitions. Word has length 28 [2021-07-13 20:53:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:43,952 INFO L482 AbstractCegarLoop]: Abstraction has 52516 states and 204300 transitions. [2021-07-13 20:53:43,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 52516 states and 204300 transitions. [2021-07-13 20:53:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:44,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:44,064 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:44,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 20:53:44,265 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:44,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-07-13 20:53:44,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:44,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219478360] [2021-07-13 20:53:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:44,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219478360] [2021-07-13 20:53:44,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219478360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:44,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669601248] [2021-07-13 20:53:44,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:44,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:53:44,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:44,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:44,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669601248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:44,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:44,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:44,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371822288] [2021-07-13 20:53:44,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:44,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:44,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:44,632 INFO L87 Difference]: Start difference. First operand 52516 states and 204300 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:45,694 INFO L93 Difference]: Finished difference Result 66808 states and 256162 transitions. [2021-07-13 20:53:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:53:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:53:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:45,967 INFO L225 Difference]: With dead ends: 66808 [2021-07-13 20:53:45,968 INFO L226 Difference]: Without dead ends: 66796 [2021-07-13 20:53:45,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:53:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66796 states. [2021-07-13 20:53:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66796 to 52450. [2021-07-13 20:53:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52449 states have (on average 3.8913420656256554) internal successors, (204097), 52449 states have internal predecessors, (204097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 204097 transitions. [2021-07-13 20:53:48,093 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 204097 transitions. Word has length 28 [2021-07-13 20:53:48,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:48,093 INFO L482 AbstractCegarLoop]: Abstraction has 52450 states and 204097 transitions. [2021-07-13 20:53:48,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:48,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 204097 transitions. [2021-07-13 20:53:48,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:48,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:48,214 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:48,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 20:53:48,415 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-07-13 20:53:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:48,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898390427] [2021-07-13 20:53:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:48,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898390427] [2021-07-13 20:53:48,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898390427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914661969] [2021-07-13 20:53:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:48,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:53:48,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:48,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914661969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:48,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:48,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 20:53:48,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490252005] [2021-07-13 20:53:48,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 20:53:48,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 20:53:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:53:48,586 INFO L87 Difference]: Start difference. First operand 52450 states and 204097 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:49,563 INFO L93 Difference]: Finished difference Result 57072 states and 219303 transitions. [2021-07-13 20:53:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:53:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-07-13 20:53:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:49,802 INFO L225 Difference]: With dead ends: 57072 [2021-07-13 20:53:49,802 INFO L226 Difference]: Without dead ends: 57072 [2021-07-13 20:53:49,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:53:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57072 states. [2021-07-13 20:53:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57072 to 52658. [2021-07-13 20:53:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52658 states, 52657 states have (on average 3.8891125586341797) internal successors, (204789), 52657 states have internal predecessors, (204789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52658 states to 52658 states and 204789 transitions. [2021-07-13 20:53:51,825 INFO L78 Accepts]: Start accepts. Automaton has 52658 states and 204789 transitions. Word has length 28 [2021-07-13 20:53:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:51,826 INFO L482 AbstractCegarLoop]: Abstraction has 52658 states and 204789 transitions. [2021-07-13 20:53:51,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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) [2021-07-13 20:53:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 52658 states and 204789 transitions. [2021-07-13 20:53:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:51,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:51,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:52,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:52,161 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-07-13 20:53:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:52,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874392428] [2021-07-13 20:53:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:52,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:52,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:52,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874392428] [2021-07-13 20:53:52,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874392428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:52,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514613175] [2021-07-13 20:53:52,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:52,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:53:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:52,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:52,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:52,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514613175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:52,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:52,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 20:53:52,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871791662] [2021-07-13 20:53:52,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 20:53:52,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:52,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 20:53:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 20:53:52,313 INFO L87 Difference]: Start difference. First operand 52658 states and 204789 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:52,839 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 20:53:53,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:53,201 INFO L93 Difference]: Finished difference Result 56883 states and 218795 transitions. [2021-07-13 20:53:53,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:53:53,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-07-13 20:53:53,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:53,471 INFO L225 Difference]: With dead ends: 56883 [2021-07-13 20:53:53,471 INFO L226 Difference]: Without dead ends: 56879 [2021-07-13 20:53:53,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 428.4ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:53:53,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56879 states. [2021-07-13 20:53:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56879 to 52598. [2021-07-13 20:53:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52598 states, 52597 states have (on average 3.889898663421868) internal successors, (204597), 52597 states have internal predecessors, (204597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:55,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52598 states to 52598 states and 204597 transitions. [2021-07-13 20:53:55,421 INFO L78 Accepts]: Start accepts. Automaton has 52598 states and 204597 transitions. Word has length 28 [2021-07-13 20:53:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:55,421 INFO L482 AbstractCegarLoop]: Abstraction has 52598 states and 204597 transitions. [2021-07-13 20:53:55,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 52598 states and 204597 transitions. [2021-07-13 20:53:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:55,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:55,524 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:55,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-07-13 20:53:55,725 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:55,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:55,725 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 87 times [2021-07-13 20:53:55,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:55,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445380585] [2021-07-13 20:53:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:55,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:55,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445380585] [2021-07-13 20:53:55,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445380585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:55,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941479288] [2021-07-13 20:53:55,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:55,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:53:55,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:55,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:53:55,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941479288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:55,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:55,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:53:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609904487] [2021-07-13 20:53:55,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:53:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:53:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:53:55,832 INFO L87 Difference]: Start difference. First operand 52598 states and 204597 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:53:56,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:53:56,665 INFO L93 Difference]: Finished difference Result 56952 states and 218997 transitions. [2021-07-13 20:53:56,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:53:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-07-13 20:53:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:53:56,891 INFO L225 Difference]: With dead ends: 56952 [2021-07-13 20:53:56,892 INFO L226 Difference]: Without dead ends: 56952 [2021-07-13 20:53:56,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:53:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56952 states. [2021-07-13 20:53:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56952 to 52718. [2021-07-13 20:53:58,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52718 states, 52717 states have (on average 3.8880247358537092) internal successors, (204965), 52717 states have internal predecessors, (204965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:53:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52718 states to 52718 states and 204965 transitions. [2021-07-13 20:53:58,837 INFO L78 Accepts]: Start accepts. Automaton has 52718 states and 204965 transitions. Word has length 28 [2021-07-13 20:53:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:53:58,837 INFO L482 AbstractCegarLoop]: Abstraction has 52718 states and 204965 transitions. [2021-07-13 20:53:58,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:53:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 52718 states and 204965 transitions. [2021-07-13 20:53:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:53:58,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:53:58,946 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:53:59,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:59,147 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:53:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:53:59,147 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 88 times [2021-07-13 20:53:59,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:53:59,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896104517] [2021-07-13 20:53:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:53:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:53:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:53:59,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:53:59,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896104517] [2021-07-13 20:53:59,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896104517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:59,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050160161] [2021-07-13 20:53:59,178 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:53:59,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:53:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:53:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:53:59,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:53:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:53:59,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050160161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:53:59,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:53:59,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 20:53:59,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799887176] [2021-07-13 20:53:59,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:53:59,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:53:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:53:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:53:59,243 INFO L87 Difference]: Start difference. First operand 52718 states and 204965 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-07-13 20:54:00,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:00,008 INFO L93 Difference]: Finished difference Result 57132 states and 219636 transitions. [2021-07-13 20:54:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:54:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-07-13 20:54:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:00,255 INFO L225 Difference]: With dead ends: 57132 [2021-07-13 20:54:00,255 INFO L226 Difference]: Without dead ends: 57120 [2021-07-13 20:54:00,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:54:00,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57120 states. [2021-07-13 20:54:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57120 to 52852. [2021-07-13 20:54:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.8863976083707024) internal successors, (205400), 52851 states have internal predecessors, (205400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205400 transitions. [2021-07-13 20:54:02,244 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205400 transitions. Word has length 28 [2021-07-13 20:54:02,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:02,244 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205400 transitions. [2021-07-13 20:54:02,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-07-13 20:54:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205400 transitions. [2021-07-13 20:54:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:02,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:02,352 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:02,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-13 20:54:02,553 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:02,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:02,553 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 89 times [2021-07-13 20:54:02,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:02,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786964437] [2021-07-13 20:54:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:02,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786964437] [2021-07-13 20:54:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786964437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:02,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119659033] [2021-07-13 20:54:02,589 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:02,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:54:02,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:02,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 20:54:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:02,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119659033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:02,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:02,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 20:54:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837241092] [2021-07-13 20:54:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:54:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:54:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:54:02,655 INFO L87 Difference]: Start difference. First operand 52852 states and 205400 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:54:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:03,445 INFO L93 Difference]: Finished difference Result 57096 states and 219552 transitions. [2021-07-13 20:54:03,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:54:03,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-07-13 20:54:03,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:03,686 INFO L225 Difference]: With dead ends: 57096 [2021-07-13 20:54:03,687 INFO L226 Difference]: Without dead ends: 57076 [2021-07-13 20:54:03,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-07-13 20:54:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-07-13 20:54:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 52852. [2021-07-13 20:54:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.886321923899264) internal successors, (205396), 52851 states have internal predecessors, (205396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205396 transitions. [2021-07-13 20:54:05,637 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205396 transitions. Word has length 28 [2021-07-13 20:54:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:05,637 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205396 transitions. [2021-07-13 20:54:05,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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) [2021-07-13 20:54:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205396 transitions. [2021-07-13 20:54:05,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:05,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:05,753 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:05,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-13 20:54:05,954 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:05,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:05,954 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-07-13 20:54:05,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:05,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425594630] [2021-07-13 20:54:05,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:05,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:05,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425594630] [2021-07-13 20:54:05,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425594630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:05,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845882080] [2021-07-13 20:54:05,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:06,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:54:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:54:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:06,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845882080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:06,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:06,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:54:06,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285609404] [2021-07-13 20:54:06,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:54:06,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:54:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:54:06,071 INFO L87 Difference]: Start difference. First operand 52852 states and 205396 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:06,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:06,851 INFO L93 Difference]: Finished difference Result 57813 states and 222961 transitions. [2021-07-13 20:54:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:54:06,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:54:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:07,099 INFO L225 Difference]: With dead ends: 57813 [2021-07-13 20:54:07,100 INFO L226 Difference]: Without dead ends: 57800 [2021-07-13 20:54:07,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:54:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57800 states. [2021-07-13 20:54:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57800 to 55585. [2021-07-13 20:54:08,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 3.8929188255613125) internal successors, (216384), 55584 states have internal predecessors, (216384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 216384 transitions. [2021-07-13 20:54:09,047 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 216384 transitions. Word has length 28 [2021-07-13 20:54:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:09,047 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 216384 transitions. [2021-07-13 20:54:09,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 216384 transitions. [2021-07-13 20:54:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:09,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:09,196 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:09,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-07-13 20:54:09,397 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-07-13 20:54:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710349891] [2021-07-13 20:54:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:09,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710349891] [2021-07-13 20:54:09,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710349891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:09,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55282090] [2021-07-13 20:54:09,430 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:09,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:54:09,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:09,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:54:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55282090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:09,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:09,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:54:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567265272] [2021-07-13 20:54:09,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:54:09,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:54:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:54:09,513 INFO L87 Difference]: Start difference. First operand 55585 states and 216384 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:10,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:10,387 INFO L93 Difference]: Finished difference Result 61541 states and 235789 transitions. [2021-07-13 20:54:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:54:10,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:54:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:10,634 INFO L225 Difference]: With dead ends: 61541 [2021-07-13 20:54:10,634 INFO L226 Difference]: Without dead ends: 61541 [2021-07-13 20:54:10,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:54:10,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61541 states. [2021-07-13 20:54:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61541 to 49164. [2021-07-13 20:54:12,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49164 states, 49163 states have (on average 3.882350548176474) internal successors, (190868), 49163 states have internal predecessors, (190868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49164 states to 49164 states and 190868 transitions. [2021-07-13 20:54:12,300 INFO L78 Accepts]: Start accepts. Automaton has 49164 states and 190868 transitions. Word has length 28 [2021-07-13 20:54:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:12,300 INFO L482 AbstractCegarLoop]: Abstraction has 49164 states and 190868 transitions. [2021-07-13 20:54:12,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 49164 states and 190868 transitions. [2021-07-13 20:54:12,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:12,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:12,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:12,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-07-13 20:54:12,600 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:12,601 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-07-13 20:54:12,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:12,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949811061] [2021-07-13 20:54:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:12,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:12,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949811061] [2021-07-13 20:54:12,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949811061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:12,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230381042] [2021-07-13 20:54:12,634 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:12,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:54:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:12,903 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-13 20:54:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:12,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230381042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:12,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:12,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 20:54:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104072240] [2021-07-13 20:54:12,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:54:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:54:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:54:12,928 INFO L87 Difference]: Start difference. First operand 49164 states and 190868 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:13,515 INFO L93 Difference]: Finished difference Result 54122 states and 207592 transitions. [2021-07-13 20:54:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:54:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:54:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:13,720 INFO L225 Difference]: With dead ends: 54122 [2021-07-13 20:54:13,720 INFO L226 Difference]: Without dead ends: 54122 [2021-07-13 20:54:13,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:54:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54122 states. [2021-07-13 20:54:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54122 to 49997. [2021-07-13 20:54:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49997 states, 49996 states have (on average 3.880830466437315) internal successors, (194026), 49996 states have internal predecessors, (194026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49997 states to 49997 states and 194026 transitions. [2021-07-13 20:54:15,391 INFO L78 Accepts]: Start accepts. Automaton has 49997 states and 194026 transitions. Word has length 28 [2021-07-13 20:54:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:15,391 INFO L482 AbstractCegarLoop]: Abstraction has 49997 states and 194026 transitions. [2021-07-13 20:54:15,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 49997 states and 194026 transitions. [2021-07-13 20:54:15,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:15,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:15,488 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:15,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:15,689 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:15,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:15,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-07-13 20:54:15,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:15,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742557842] [2021-07-13 20:54:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:15,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:15,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742557842] [2021-07-13 20:54:15,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742557842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:15,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539188295] [2021-07-13 20:54:15,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:15,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:54:15,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:15,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:54:15,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:15,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539188295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:15,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:15,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-13 20:54:15,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400392721] [2021-07-13 20:54:15,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 20:54:15,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 20:54:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:54:15,812 INFO L87 Difference]: Start difference. First operand 49997 states and 194026 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:16,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:16,507 INFO L93 Difference]: Finished difference Result 51830 states and 200167 transitions. [2021-07-13 20:54:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 20:54:16,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-07-13 20:54:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:16,722 INFO L225 Difference]: With dead ends: 51830 [2021-07-13 20:54:16,722 INFO L226 Difference]: Without dead ends: 51830 [2021-07-13 20:54:16,722 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:54:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51830 states. [2021-07-13 20:54:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51830 to 50005. [2021-07-13 20:54:18,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.880689544836413) internal successors, (194050), 50004 states have internal predecessors, (194050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:18,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 194050 transitions. [2021-07-13 20:54:18,188 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 194050 transitions. Word has length 28 [2021-07-13 20:54:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:18,189 INFO L482 AbstractCegarLoop]: Abstraction has 50005 states and 194050 transitions. [2021-07-13 20:54:18,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 194050 transitions. [2021-07-13 20:54:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 20:54:18,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:18,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:18,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:18,484 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:18,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:18,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-07-13 20:54:18,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:18,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982270579] [2021-07-13 20:54:18,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:18,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:18,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982270579] [2021-07-13 20:54:18,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982270579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:18,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998656233] [2021-07-13 20:54:18,749 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 20:54:18,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:54:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 20:54:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:18,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:18,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998656233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:18,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:18,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 20:54:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802812201] [2021-07-13 20:54:18,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 20:54:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 20:54:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:54:18,855 INFO L87 Difference]: Start difference. First operand 50005 states and 194050 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:19,384 INFO L93 Difference]: Finished difference Result 51550 states and 199245 transitions. [2021-07-13 20:54:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 20:54:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 20:54:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:19,576 INFO L225 Difference]: With dead ends: 51550 [2021-07-13 20:54:19,577 INFO L226 Difference]: Without dead ends: 51550 [2021-07-13 20:54:19,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:54:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51550 states. [2021-07-13 20:54:20,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51550 to 49899. [2021-07-13 20:54:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49899 states, 49898 states have (on average 3.8804360896228305) internal successors, (193626), 49898 states have internal predecessors, (193626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49899 states to 49899 states and 193626 transitions. [2021-07-13 20:54:21,219 INFO L78 Accepts]: Start accepts. Automaton has 49899 states and 193626 transitions. Word has length 28 [2021-07-13 20:54:21,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:21,219 INFO L482 AbstractCegarLoop]: Abstraction has 49899 states and 193626 transitions. [2021-07-13 20:54:21,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 49899 states and 193626 transitions. [2021-07-13 20:54:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:21,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:21,317 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:21,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:21,518 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:21,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:21,518 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-07-13 20:54:21,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:21,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913124236] [2021-07-13 20:54:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:21,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:21,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913124236] [2021-07-13 20:54:21,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913124236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:21,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831820625] [2021-07-13 20:54:21,735 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:21,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:54:21,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:21,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:54:21,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:54:22,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:54:22,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:22,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:22,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:54:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831820625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:22,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:22,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:54:22,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880695932] [2021-07-13 20:54:22,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:54:22,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:54:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:54:22,024 INFO L87 Difference]: Start difference. First operand 49899 states and 193626 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:54:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:23,459 INFO L93 Difference]: Finished difference Result 53034 states and 202923 transitions. [2021-07-13 20:54:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:54:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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 30 [2021-07-13 20:54:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:23,785 INFO L225 Difference]: With dead ends: 53034 [2021-07-13 20:54:23,785 INFO L226 Difference]: Without dead ends: 53004 [2021-07-13 20:54:23,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 949.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 20:54:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-07-13 20:54:25,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49956. [2021-07-13 20:54:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49956 states, 49955 states have (on average 3.8796717045340805) internal successors, (193809), 49955 states have internal predecessors, (193809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49956 states to 49956 states and 193809 transitions. [2021-07-13 20:54:25,286 INFO L78 Accepts]: Start accepts. Automaton has 49956 states and 193809 transitions. Word has length 30 [2021-07-13 20:54:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:25,286 INFO L482 AbstractCegarLoop]: Abstraction has 49956 states and 193809 transitions. [2021-07-13 20:54:25,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:54:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 49956 states and 193809 transitions. [2021-07-13 20:54:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:25,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:25,393 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:25,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:25,594 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:25,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:25,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-07-13 20:54:25,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:25,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706117456] [2021-07-13 20:54:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:25,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:25,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706117456] [2021-07-13 20:54:25,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706117456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:25,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682371706] [2021-07-13 20:54:25,811 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:25,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:54:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:25,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:54:25,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:26,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:26,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:54:26,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:54:26,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:26,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:26,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-07-13 20:54:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:26,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682371706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:26,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:26,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:54:26,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090306033] [2021-07-13 20:54:26,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:54:26,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:54:26,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:54:26,345 INFO L87 Difference]: Start difference. First operand 49956 states and 193809 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:28,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:28,223 INFO L93 Difference]: Finished difference Result 53044 states and 202956 transitions. [2021-07-13 20:54:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:54:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:54:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:28,455 INFO L225 Difference]: With dead ends: 53044 [2021-07-13 20:54:28,455 INFO L226 Difference]: Without dead ends: 53029 [2021-07-13 20:54:28,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1109.5ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:54:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53029 states. [2021-07-13 20:54:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53029 to 49948. [2021-07-13 20:54:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49948 states, 49947 states have (on average 3.8798726650249264) internal successors, (193788), 49947 states have internal predecessors, (193788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49948 states to 49948 states and 193788 transitions. [2021-07-13 20:54:29,960 INFO L78 Accepts]: Start accepts. Automaton has 49948 states and 193788 transitions. Word has length 30 [2021-07-13 20:54:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:29,961 INFO L482 AbstractCegarLoop]: Abstraction has 49948 states and 193788 transitions. [2021-07-13 20:54:29,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 49948 states and 193788 transitions. [2021-07-13 20:54:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:30,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:30,069 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:30,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:30,285 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:30,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:30,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-07-13 20:54:30,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:30,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668039201] [2021-07-13 20:54:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:30,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:30,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668039201] [2021-07-13 20:54:30,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668039201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:30,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120486321] [2021-07-13 20:54:30,493 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:30,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:54:30,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:54:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:30,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:30,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:30,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:30,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:30,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:30,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:54:30,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:54:30,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:30,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:30,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:54:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120486321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:30,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:30,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-13 20:54:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252304866] [2021-07-13 20:54:30,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:54:30,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:30,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:54:30,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:54:30,987 INFO L87 Difference]: Start difference. First operand 49948 states and 193788 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:54:32,412 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-07-13 20:54:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:34,573 INFO L93 Difference]: Finished difference Result 63314 states and 238515 transitions. [2021-07-13 20:54:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:54:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:54:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:34,814 INFO L225 Difference]: With dead ends: 63314 [2021-07-13 20:54:34,814 INFO L226 Difference]: Without dead ends: 63299 [2021-07-13 20:54:34,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2845.8ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:54:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63299 states. [2021-07-13 20:54:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63299 to 50006. [2021-07-13 20:54:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50006 states, 50005 states have (on average 3.8794120587941205) internal successors, (193990), 50005 states have internal predecessors, (193990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50006 states to 50006 states and 193990 transitions. [2021-07-13 20:54:36,526 INFO L78 Accepts]: Start accepts. Automaton has 50006 states and 193990 transitions. Word has length 30 [2021-07-13 20:54:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:36,526 INFO L482 AbstractCegarLoop]: Abstraction has 50006 states and 193990 transitions. [2021-07-13 20:54:36,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:54:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 50006 states and 193990 transitions. [2021-07-13 20:54:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:36,637 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:36,637 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:36,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 20:54:36,838 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-07-13 20:54:36,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:36,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240939441] [2021-07-13 20:54:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:37,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:37,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240939441] [2021-07-13 20:54:37,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240939441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:37,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267902484] [2021-07-13 20:54:37,069 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:54:37,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:37,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:37,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:54:37,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:54:37,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:37,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:37,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:54:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:37,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267902484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:37,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:37,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:54:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756947539] [2021-07-13 20:54:37,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:54:37,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:54:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:54:37,568 INFO L87 Difference]: Start difference. First operand 50006 states and 193990 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:39,175 INFO L93 Difference]: Finished difference Result 55413 states and 210324 transitions. [2021-07-13 20:54:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:54:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:54:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:39,392 INFO L225 Difference]: With dead ends: 55413 [2021-07-13 20:54:39,393 INFO L226 Difference]: Without dead ends: 55398 [2021-07-13 20:54:39,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:54:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-07-13 20:54:40,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 50051. [2021-07-13 20:54:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50051 states, 50050 states have (on average 3.878981018981019) internal successors, (194143), 50050 states have internal predecessors, (194143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50051 states to 50051 states and 194143 transitions. [2021-07-13 20:54:40,941 INFO L78 Accepts]: Start accepts. Automaton has 50051 states and 194143 transitions. Word has length 30 [2021-07-13 20:54:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:40,942 INFO L482 AbstractCegarLoop]: Abstraction has 50051 states and 194143 transitions. [2021-07-13 20:54:40,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 50051 states and 194143 transitions. [2021-07-13 20:54:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:41,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:41,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:41,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-07-13 20:54:41,255 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-07-13 20:54:41,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:41,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361548473] [2021-07-13 20:54:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:41,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:41,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361548473] [2021-07-13 20:54:41,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361548473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:41,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324400506] [2021-07-13 20:54:41,705 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:41,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:54:41,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:54:41,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:41,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:41,987 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:54:41,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:54:42,058 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.0 percent of original size [2021-07-13 20:54:42,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 20:54:42,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:84 [2021-07-13 20:54:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:42,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324400506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:42,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:42,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:54:42,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204671630] [2021-07-13 20:54:42,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:54:42,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:54:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:54:42,144 INFO L87 Difference]: Start difference. First operand 50051 states and 194143 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:54:44,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:44,712 INFO L93 Difference]: Finished difference Result 53236 states and 203549 transitions. [2021-07-13 20:54:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:54:44,712 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:54:44,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:44,920 INFO L225 Difference]: With dead ends: 53236 [2021-07-13 20:54:44,921 INFO L226 Difference]: Without dead ends: 53221 [2021-07-13 20:54:44,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 2096.1ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:54:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53221 states. [2021-07-13 20:54:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53221 to 50057. [2021-07-13 20:54:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50057 states, 50056 states have (on average 3.8790155026370465) internal successors, (194168), 50056 states have internal predecessors, (194168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50057 states to 50057 states and 194168 transitions. [2021-07-13 20:54:46,452 INFO L78 Accepts]: Start accepts. Automaton has 50057 states and 194168 transitions. Word has length 30 [2021-07-13 20:54:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:46,452 INFO L482 AbstractCegarLoop]: Abstraction has 50057 states and 194168 transitions. [2021-07-13 20:54:46,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:54:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50057 states and 194168 transitions. [2021-07-13 20:54:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:46,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:46,563 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:46,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:46,764 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-07-13 20:54:46,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:46,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066520559] [2021-07-13 20:54:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:46,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066520559] [2021-07-13 20:54:46,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066520559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:46,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346607901] [2021-07-13 20:54:46,951 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:46,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:54:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:54:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:47,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:47,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:47,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 59 [2021-07-13 20:54:47,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:54:47,611 INFO L628 ElimStorePlain]: treesize reduction 169, result has 26.5 percent of original size [2021-07-13 20:54:47,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:47,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:87 [2021-07-13 20:54:47,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:47,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346607901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:47,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:47,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-07-13 20:54:47,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680971826] [2021-07-13 20:54:47,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:54:47,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:47,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:54:47,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:54:47,719 INFO L87 Difference]: Start difference. First operand 50057 states and 194168 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:48,963 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-07-13 20:54:49,806 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-07-13 20:54:50,539 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-07-13 20:54:50,763 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-07-13 20:54:51,013 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-07-13 20:54:51,447 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-07-13 20:54:51,995 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-07-13 20:54:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:54:53,116 INFO L93 Difference]: Finished difference Result 71077 states and 266109 transitions. [2021-07-13 20:54:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:54:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:54:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:54:53,415 INFO L225 Difference]: With dead ends: 71077 [2021-07-13 20:54:53,415 INFO L226 Difference]: Without dead ends: 71047 [2021-07-13 20:54:53,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4114.3ms TimeCoverageRelationStatistics Valid=725, Invalid=5281, Unknown=0, NotChecked=0, Total=6006 [2021-07-13 20:54:53,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71047 states. [2021-07-13 20:54:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71047 to 50086. [2021-07-13 20:54:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.8791055206149547) internal successors, (194285), 50085 states have internal predecessors, (194285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:55,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194285 transitions. [2021-07-13 20:54:55,137 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194285 transitions. Word has length 30 [2021-07-13 20:54:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:54:55,137 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194285 transitions. [2021-07-13 20:54:55,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194285 transitions. [2021-07-13 20:54:55,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:54:55,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:54:55,231 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:54:55,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-07-13 20:54:55,431 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:54:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:54:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 172 times [2021-07-13 20:54:55,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:54:55,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626322932] [2021-07-13 20:54:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:54:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:54:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:55,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:54:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626322932] [2021-07-13 20:54:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626322932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692300807] [2021-07-13 20:54:55,582 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:54:55,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:54:55,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:54:55,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:54:55,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:54:55,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:55,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:55,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:54:55,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:54:55,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:54:55,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:54:55,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:54:55,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:54:55,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:54:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:54:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692300807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:54:55,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:54:55,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:54:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538491522] [2021-07-13 20:54:55,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:54:55,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:54:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:54:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:54:55,916 INFO L87 Difference]: Start difference. First operand 50086 states and 194285 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:54:56,275 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-13 20:54:57,924 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 20:55:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:00,133 INFO L93 Difference]: Finished difference Result 84102 states and 311805 transitions. [2021-07-13 20:55:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:55:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:55:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:00,417 INFO L225 Difference]: With dead ends: 84102 [2021-07-13 20:55:00,417 INFO L226 Difference]: Without dead ends: 84072 [2021-07-13 20:55:00,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2908.2ms TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 20:55:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84072 states. [2021-07-13 20:55:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84072 to 50147. [2021-07-13 20:55:02,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50147 states, 50146 states have (on average 3.8789534559087464) internal successors, (194514), 50146 states have internal predecessors, (194514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50147 states to 50147 states and 194514 transitions. [2021-07-13 20:55:02,303 INFO L78 Accepts]: Start accepts. Automaton has 50147 states and 194514 transitions. Word has length 30 [2021-07-13 20:55:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:02,303 INFO L482 AbstractCegarLoop]: Abstraction has 50147 states and 194514 transitions. [2021-07-13 20:55:02,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 50147 states and 194514 transitions. [2021-07-13 20:55:02,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:02,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:02,408 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:02,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:02,608 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 173 times [2021-07-13 20:55:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:02,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593966209] [2021-07-13 20:55:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:02,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:02,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593966209] [2021-07-13 20:55:02,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593966209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:02,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806923902] [2021-07-13 20:55:02,754 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:02,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:55:02,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:02,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:03,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:03,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:03,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:03,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:55:03,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:03,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:03,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:03,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:55:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:03,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806923902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:03,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:03,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:55:03,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938341414] [2021-07-13 20:55:03,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:55:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:55:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:55:03,249 INFO L87 Difference]: Start difference. First operand 50147 states and 194514 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:06,558 INFO L93 Difference]: Finished difference Result 83268 states and 309473 transitions. [2021-07-13 20:55:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:55:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:55:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:06,840 INFO L225 Difference]: With dead ends: 83268 [2021-07-13 20:55:06,840 INFO L226 Difference]: Without dead ends: 83253 [2021-07-13 20:55:06,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1993.0ms TimeCoverageRelationStatistics Valid=413, Invalid=3493, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 20:55:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83253 states. [2021-07-13 20:55:08,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83253 to 50159. [2021-07-13 20:55:08,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 3.8786634235814823) internal successors, (194546), 50158 states have internal predecessors, (194546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 194546 transitions. [2021-07-13 20:55:08,701 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 194546 transitions. Word has length 30 [2021-07-13 20:55:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:08,702 INFO L482 AbstractCegarLoop]: Abstraction has 50159 states and 194546 transitions. [2021-07-13 20:55:08,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 194546 transitions. [2021-07-13 20:55:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:08,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:08,795 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:08,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:08,996 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 174 times [2021-07-13 20:55:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:08,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082817181] [2021-07-13 20:55:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:09,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082817181] [2021-07-13 20:55:09,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082817181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982648574] [2021-07-13 20:55:09,154 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:09,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:55:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:09,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:09,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:09,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:09,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:55:09,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:09,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:09,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:09,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:55:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:09,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982648574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:09,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:09,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:55:09,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142979997] [2021-07-13 20:55:09,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:55:09,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:09,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:55:09,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:55:09,459 INFO L87 Difference]: Start difference. First operand 50159 states and 194546 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:09,785 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-13 20:55:11,618 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-13 20:55:12,049 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-07-13 20:55:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:13,511 INFO L93 Difference]: Finished difference Result 94075 states and 345871 transitions. [2021-07-13 20:55:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-07-13 20:55:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:55:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:13,844 INFO L225 Difference]: With dead ends: 94075 [2021-07-13 20:55:13,844 INFO L226 Difference]: Without dead ends: 94045 [2021-07-13 20:55:13,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2850.3ms TimeCoverageRelationStatistics Valid=621, Invalid=4781, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 20:55:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94045 states. [2021-07-13 20:55:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94045 to 50168. [2021-07-13 20:55:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50168 states, 50167 states have (on average 3.8787449917276295) internal successors, (194585), 50167 states have internal predecessors, (194585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50168 states to 50168 states and 194585 transitions. [2021-07-13 20:55:15,985 INFO L78 Accepts]: Start accepts. Automaton has 50168 states and 194585 transitions. Word has length 30 [2021-07-13 20:55:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 50168 states and 194585 transitions. [2021-07-13 20:55:15,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50168 states and 194585 transitions. [2021-07-13 20:55:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:16,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:16,082 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:16,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-07-13 20:55:16,282 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash -450848413, now seen corresponding path program 90 times [2021-07-13 20:55:16,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:16,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346676898] [2021-07-13 20:55:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:16,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:16,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346676898] [2021-07-13 20:55:16,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346676898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:16,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6054432] [2021-07-13 20:55:16,627 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 [2021-07-13 20:55:16,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:55:16,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:16,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:55:16,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:16,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:16,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:16,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:55:16,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:16,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:16,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:16,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-13 20:55:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:16,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6054432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:16,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:16,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:55:16,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362802762] [2021-07-13 20:55:16,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:55:16,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:55:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:55:16,881 INFO L87 Difference]: Start difference. First operand 50168 states and 194585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:18,596 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-07-13 20:55:19,308 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-07-13 20:55:19,442 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-13 20:55:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:21,507 INFO L93 Difference]: Finished difference Result 63519 states and 239225 transitions. [2021-07-13 20:55:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 20:55:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:55:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:21,724 INFO L225 Difference]: With dead ends: 63519 [2021-07-13 20:55:21,724 INFO L226 Difference]: Without dead ends: 63504 [2021-07-13 20:55:21,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3637.5ms TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:55:21,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63504 states. [2021-07-13 20:55:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63504 to 50203. [2021-07-13 20:55:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50203 states, 50202 states have (on average 3.8777538743476354) internal successors, (194671), 50202 states have internal predecessors, (194671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50203 states to 50203 states and 194671 transitions. [2021-07-13 20:55:23,461 INFO L78 Accepts]: Start accepts. Automaton has 50203 states and 194671 transitions. Word has length 30 [2021-07-13 20:55:23,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:23,461 INFO L482 AbstractCegarLoop]: Abstraction has 50203 states and 194671 transitions. [2021-07-13 20:55:23,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50203 states and 194671 transitions. [2021-07-13 20:55:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:23,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:23,550 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:23,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-07-13 20:55:23,758 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash 878036001, now seen corresponding path program 175 times [2021-07-13 20:55:23,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:23,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151774256] [2021-07-13 20:55:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:23,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151774256] [2021-07-13 20:55:23,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151774256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:23,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423024397] [2021-07-13 20:55:23,910 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 [2021-07-13 20:55:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:24,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:24,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:24,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:24,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:55:24,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:24,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:24,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:24,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:55:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:24,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423024397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:24,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:24,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:55:24,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793125566] [2021-07-13 20:55:24,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:55:24,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:55:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:55:24,314 INFO L87 Difference]: Start difference. First operand 50203 states and 194671 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:24,882 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-07-13 20:55:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:28,276 INFO L93 Difference]: Finished difference Result 83399 states and 309818 transitions. [2021-07-13 20:55:28,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:55:28,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:55:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:28,568 INFO L225 Difference]: With dead ends: 83399 [2021-07-13 20:55:28,568 INFO L226 Difference]: Without dead ends: 83384 [2021-07-13 20:55:28,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2438.5ms TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:55:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83384 states. [2021-07-13 20:55:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83384 to 50245. [2021-07-13 20:55:30,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-07-13 20:55:30,418 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-07-13 20:55:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:30,418 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-07-13 20:55:30,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:30,418 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-07-13 20:55:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:30,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:30,513 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:30,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-07-13 20:55:30,713 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2084417043, now seen corresponding path program 176 times [2021-07-13 20:55:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118372383] [2021-07-13 20:55:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118372383] [2021-07-13 20:55:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118372383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357483401] [2021-07-13 20:55:30,900 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 [2021-07-13 20:55:30,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:55:30,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:30,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:31,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:31,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:31,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:31,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:55:31,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:31,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:31,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:31,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:55:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357483401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:31,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:31,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:55:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869136558] [2021-07-13 20:55:31,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:55:31,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:55:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:55:31,133 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:32,811 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-07-13 20:55:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:34,737 INFO L93 Difference]: Finished difference Result 71516 states and 267553 transitions. [2021-07-13 20:55:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:55:34,737 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:55:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:34,965 INFO L225 Difference]: With dead ends: 71516 [2021-07-13 20:55:34,965 INFO L226 Difference]: Without dead ends: 71501 [2021-07-13 20:55:34,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2683.1ms TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:55:35,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2021-07-13 20:55:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 50245. [2021-07-13 20:55:36,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-07-13 20:55:36,465 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-07-13 20:55:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:36,465 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-07-13 20:55:36,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-07-13 20:55:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:36,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:36,558 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:36,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-07-13 20:55:36,759 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:36,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1108098199, now seen corresponding path program 177 times [2021-07-13 20:55:36,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:36,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191440921] [2021-07-13 20:55:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:36,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191440921] [2021-07-13 20:55:36,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191440921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:36,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315839547] [2021-07-13 20:55:36,905 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 [2021-07-13 20:55:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:55:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:55:36,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:37,201 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 20:55:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:37,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-07-13 20:55:37,785 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:55:38,080 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-07-13 20:55:38,081 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.0 percent of original size [2021-07-13 20:55:38,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:55:38,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:2120 [2021-07-13 20:55:39,016 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 54 [2021-07-13 20:55:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:39,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315839547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:39,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:39,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-07-13 20:55:39,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784408162] [2021-07-13 20:55:39,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:55:39,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:55:39,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:55:39,190 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) 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) [2021-07-13 20:55:40,329 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-07-13 20:55:44,271 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-07-13 20:55:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:44,670 INFO L93 Difference]: Finished difference Result 84175 states and 312104 transitions. [2021-07-13 20:55:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:55:44,670 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 [2021-07-13 20:55:44,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:45,098 INFO L225 Difference]: With dead ends: 84175 [2021-07-13 20:55:45,098 INFO L226 Difference]: Without dead ends: 84145 [2021-07-13 20:55:45,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4522.2ms TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:55:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84145 states. [2021-07-13 20:55:46,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84145 to 50231. [2021-07-13 20:55:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50231 states, 50230 states have (on average 3.8775233923949832) internal successors, (194768), 50230 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50231 states to 50231 states and 194768 transitions. [2021-07-13 20:55:46,707 INFO L78 Accepts]: Start accepts. Automaton has 50231 states and 194768 transitions. Word has length 30 [2021-07-13 20:55:46,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:46,707 INFO L482 AbstractCegarLoop]: Abstraction has 50231 states and 194768 transitions. [2021-07-13 20:55:46,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) 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) [2021-07-13 20:55:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50231 states and 194768 transitions. [2021-07-13 20:55:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:47,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:47,027 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-07-13 20:55:47,228 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1339274201, now seen corresponding path program 178 times [2021-07-13 20:55:47,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:47,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024907267] [2021-07-13 20:55:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:47,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024907267] [2021-07-13 20:55:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024907267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82623659] [2021-07-13 20:55:47,468 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:47,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:55:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:47,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:47,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:47,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:55:47,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:47,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:47,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:47,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:55:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82623659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:47,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:47,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:55:47,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914490906] [2021-07-13 20:55:47,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:55:47,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:55:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:55:47,735 INFO L87 Difference]: Start difference. First operand 50231 states and 194768 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:55:49,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:49,419 INFO L93 Difference]: Finished difference Result 73610 states and 278935 transitions. [2021-07-13 20:55:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:55:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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 30 [2021-07-13 20:55:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:49,810 INFO L225 Difference]: With dead ends: 73610 [2021-07-13 20:55:49,810 INFO L226 Difference]: Without dead ends: 73580 [2021-07-13 20:55:49,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:55:49,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73580 states. [2021-07-13 20:55:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73580 to 50288. [2021-07-13 20:55:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50288 states, 50287 states have (on average 3.876946328076839) internal successors, (194960), 50287 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50288 states to 50288 states and 194960 transitions. [2021-07-13 20:55:51,346 INFO L78 Accepts]: Start accepts. Automaton has 50288 states and 194960 transitions. Word has length 30 [2021-07-13 20:55:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:51,346 INFO L482 AbstractCegarLoop]: Abstraction has 50288 states and 194960 transitions. [2021-07-13 20:55:51,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:55:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 50288 states and 194960 transitions. [2021-07-13 20:55:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:51,697 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:51,697 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:51,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-07-13 20:55:51,905 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash 927295079, now seen corresponding path program 179 times [2021-07-13 20:55:51,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:51,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350204568] [2021-07-13 20:55:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:52,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:52,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350204568] [2021-07-13 20:55:52,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350204568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:52,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17945642] [2021-07-13 20:55:52,161 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) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:52,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:55:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:55:52,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:52,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:52,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:52,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:55:52,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:52,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:52,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:52,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-07-13 20:55:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17945642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:52,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:52,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:55:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346300633] [2021-07-13 20:55:52,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:55:52,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:55:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:55:52,468 INFO L87 Difference]: Start difference. First operand 50288 states and 194960 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:54,875 INFO L93 Difference]: Finished difference Result 73555 states and 278809 transitions. [2021-07-13 20:55:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:55:54,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:55:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:55,117 INFO L225 Difference]: With dead ends: 73555 [2021-07-13 20:55:55,117 INFO L226 Difference]: Without dead ends: 73540 [2021-07-13 20:55:55,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1599.3ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:55:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73540 states. [2021-07-13 20:55:56,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73540 to 50280. [2021-07-13 20:55:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50280 states, 50279 states have (on average 3.8771455279540166) internal successors, (194939), 50279 states have internal predecessors, (194939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50280 states to 50280 states and 194939 transitions. [2021-07-13 20:55:56,807 INFO L78 Accepts]: Start accepts. Automaton has 50280 states and 194939 transitions. Word has length 30 [2021-07-13 20:55:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:55:56,807 INFO L482 AbstractCegarLoop]: Abstraction has 50280 states and 194939 transitions. [2021-07-13 20:55:56,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 50280 states and 194939 transitions. [2021-07-13 20:55:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:55:56,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:55:56,892 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:55:57,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:57,093 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:55:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:55:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash -971195733, now seen corresponding path program 180 times [2021-07-13 20:55:57,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:55:57,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137894571] [2021-07-13 20:55:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:55:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:55:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:57,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:55:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137894571] [2021-07-13 20:55:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137894571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433534087] [2021-07-13 20:55:57,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:55:57,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:55:57,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:55:57,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:55:57,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:55:57,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:55:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:55:57,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:55:57,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:55:57,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:55:57,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:55:57,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:55:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:55:57,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433534087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:55:57,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:55:57,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:55:57,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157050691] [2021-07-13 20:55:57,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:55:57,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:55:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:55:57,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:55:57,575 INFO L87 Difference]: Start difference. First operand 50280 states and 194939 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:55:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:55:59,530 INFO L93 Difference]: Finished difference Result 76864 states and 288901 transitions. [2021-07-13 20:55:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:55:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:55:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:55:59,790 INFO L225 Difference]: With dead ends: 76864 [2021-07-13 20:55:59,790 INFO L226 Difference]: Without dead ends: 76849 [2021-07-13 20:55:59,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1166.7ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:55:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76849 states. [2021-07-13 20:56:01,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76849 to 50282. [2021-07-13 20:56:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8772498558103456) internal successors, (194952), 50281 states have internal predecessors, (194952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:01,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194952 transitions. [2021-07-13 20:56:01,498 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194952 transitions. Word has length 30 [2021-07-13 20:56:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:01,498 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194952 transitions. [2021-07-13 20:56:01,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194952 transitions. [2021-07-13 20:56:01,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:01,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:01,590 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:01,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-07-13 20:56:01,791 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash -397133013, now seen corresponding path program 181 times [2021-07-13 20:56:01,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:01,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996014459] [2021-07-13 20:56:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:01,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:01,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996014459] [2021-07-13 20:56:01,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996014459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:01,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536457084] [2021-07-13 20:56:01,942 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 [2021-07-13 20:56:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:56:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:02,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:02,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:02,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:02,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:02,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:56:02,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:56:02,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:02,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:02,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:56:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:02,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536457084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:02,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:02,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:56:02,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656841939] [2021-07-13 20:56:02,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:56:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:56:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:56:02,276 INFO L87 Difference]: Start difference. First operand 50282 states and 194952 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:07,263 INFO L93 Difference]: Finished difference Result 91774 states and 339295 transitions. [2021-07-13 20:56:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 20:56:07,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:56:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:07,572 INFO L225 Difference]: With dead ends: 91774 [2021-07-13 20:56:07,572 INFO L226 Difference]: Without dead ends: 91744 [2021-07-13 20:56:07,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 3144.4ms TimeCoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:56:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91744 states. [2021-07-13 20:56:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91744 to 50413. [2021-07-13 20:56:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-07-13 20:56:09,485 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-07-13 20:56:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:09,485 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-07-13 20:56:09,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-07-13 20:56:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:09,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:09,577 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:09,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-07-13 20:56:09,793 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:09,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1812767055, now seen corresponding path program 182 times [2021-07-13 20:56:09,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:09,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703498875] [2021-07-13 20:56:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:10,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:10,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703498875] [2021-07-13 20:56:10,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703498875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:10,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381028451] [2021-07-13 20:56:10,029 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 [2021-07-13 20:56:10,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:56:10,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:10,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:10,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:10,420 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:56:10,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:10,566 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:56:10,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:56:10,658 INFO L628 ElimStorePlain]: treesize reduction 150, result has 31.5 percent of original size [2021-07-13 20:56:10,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:56:10,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:88 [2021-07-13 20:56:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381028451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:10,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:10,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:56:10,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106022330] [2021-07-13 20:56:10,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:56:10,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:10,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:56:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:56:10,744 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:11,924 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-07-13 20:56:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:13,362 INFO L93 Difference]: Finished difference Result 72565 states and 275989 transitions. [2021-07-13 20:56:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:56:13,362 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:56:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:13,600 INFO L225 Difference]: With dead ends: 72565 [2021-07-13 20:56:13,600 INFO L226 Difference]: Without dead ends: 72535 [2021-07-13 20:56:13,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1840.3ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:56:13,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72535 states. [2021-07-13 20:56:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72535 to 50413. [2021-07-13 20:56:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-07-13 20:56:15,089 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-07-13 20:56:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:15,089 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-07-13 20:56:15,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-07-13 20:56:15,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:15,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:15,180 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:15,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-07-13 20:56:15,380 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash -215630961, now seen corresponding path program 183 times [2021-07-13 20:56:15,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:15,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348699645] [2021-07-13 20:56:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:15,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348699645] [2021-07-13 20:56:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348699645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236470995] [2021-07-13 20:56:15,604 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 [2021-07-13 20:56:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:56:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:15,835 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-13 20:56:16,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:16,057 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:56:16,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:56:16,162 INFO L628 ElimStorePlain]: treesize reduction 131, result has 36.7 percent of original size [2021-07-13 20:56:16,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:56:16,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:69 [2021-07-13 20:56:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:16,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236470995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:16,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:16,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:56:16,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029491437] [2021-07-13 20:56:16,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:56:16,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:16,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:56:16,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:56:16,240 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:18,921 INFO L93 Difference]: Finished difference Result 72583 states and 276055 transitions. [2021-07-13 20:56:18,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:56:18,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:56:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:19,157 INFO L225 Difference]: With dead ends: 72583 [2021-07-13 20:56:19,157 INFO L226 Difference]: Without dead ends: 72568 [2021-07-13 20:56:19,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1920.3ms TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:56:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72568 states. [2021-07-13 20:56:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72568 to 50379. [2021-07-13 20:56:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50379 states, 50378 states have (on average 3.8765334074397555) internal successors, (195292), 50378 states have internal predecessors, (195292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:20,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 195292 transitions. [2021-07-13 20:56:20,820 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 195292 transitions. Word has length 30 [2021-07-13 20:56:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:20,820 INFO L482 AbstractCegarLoop]: Abstraction has 50379 states and 195292 transitions. [2021-07-13 20:56:20,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 195292 transitions. [2021-07-13 20:56:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:20,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:20,907 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:21,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:21,107 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2141926627, now seen corresponding path program 184 times [2021-07-13 20:56:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:21,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978080409] [2021-07-13 20:56:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:21,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:21,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978080409] [2021-07-13 20:56:21,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978080409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:21,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438314636] [2021-07-13 20:56:21,263 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 [2021-07-13 20:56:21,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:56:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:21,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:21,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:21,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:21,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:56:21,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:56:21,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:21,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:21,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:56:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:21,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438314636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:21,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:21,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:56:21,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447453449] [2021-07-13 20:56:21,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:56:21,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:21,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:56:21,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:56:21,534 INFO L87 Difference]: Start difference. First operand 50379 states and 195292 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:56:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:23,598 INFO L93 Difference]: Finished difference Result 74068 states and 280349 transitions. [2021-07-13 20:56:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:56:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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 30 [2021-07-13 20:56:23,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:23,846 INFO L225 Difference]: With dead ends: 74068 [2021-07-13 20:56:23,846 INFO L226 Difference]: Without dead ends: 74038 [2021-07-13 20:56:23,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1128.8ms TimeCoverageRelationStatistics Valid=496, Invalid=2366, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:56:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74038 states. [2021-07-13 20:56:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74038 to 50389. [2021-07-13 20:56:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50389 states, 50388 states have (on average 3.8765579106136383) internal successors, (195332), 50388 states have internal predecessors, (195332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50389 states to 50389 states and 195332 transitions. [2021-07-13 20:56:25,556 INFO L78 Accepts]: Start accepts. Automaton has 50389 states and 195332 transitions. Word has length 30 [2021-07-13 20:56:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:25,557 INFO L482 AbstractCegarLoop]: Abstraction has 50389 states and 195332 transitions. [2021-07-13 20:56:25,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) 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) [2021-07-13 20:56:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 50389 states and 195332 transitions. [2021-07-13 20:56:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:25,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:25,643 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:25,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:25,844 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:25,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:25,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1974117535, now seen corresponding path program 185 times [2021-07-13 20:56:25,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:25,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928188499] [2021-07-13 20:56:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:26,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928188499] [2021-07-13 20:56:26,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928188499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:26,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719996192] [2021-07-13 20:56:26,011 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 [2021-07-13 20:56:26,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:56:26,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:26,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:26,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:26,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:26,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:26,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:26,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:26,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-07-13 20:56:26,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:56:26,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:26,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:26,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:7 [2021-07-13 20:56:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:26,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719996192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:26,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:26,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 20:56:26,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386403045] [2021-07-13 20:56:26,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 20:56:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 20:56:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 20:56:26,262 INFO L87 Difference]: Start difference. First operand 50389 states and 195332 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:26,563 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-07-13 20:56:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:27,767 INFO L93 Difference]: Finished difference Result 60193 states and 228714 transitions. [2021-07-13 20:56:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:56:27,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:56:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:27,962 INFO L225 Difference]: With dead ends: 60193 [2021-07-13 20:56:27,962 INFO L226 Difference]: Without dead ends: 60178 [2021-07-13 20:56:27,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:56:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2021-07-13 20:56:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 50385. [2021-07-13 20:56:29,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50385 states, 50384 states have (on average 3.876587805652588) internal successors, (195318), 50384 states have internal predecessors, (195318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50385 states to 50385 states and 195318 transitions. [2021-07-13 20:56:29,329 INFO L78 Accepts]: Start accepts. Automaton has 50385 states and 195318 transitions. Word has length 30 [2021-07-13 20:56:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:29,329 INFO L482 AbstractCegarLoop]: Abstraction has 50385 states and 195318 transitions. [2021-07-13 20:56:29,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:29,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50385 states and 195318 transitions. [2021-07-13 20:56:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:29,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:29,419 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:29,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-07-13 20:56:29,619 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:29,620 INFO L82 PathProgramCache]: Analyzing trace with hash -93398493, now seen corresponding path program 186 times [2021-07-13 20:56:29,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:29,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45961812] [2021-07-13 20:56:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:29,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45961812] [2021-07-13 20:56:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45961812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:29,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713735810] [2021-07-13 20:56:29,781 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 [2021-07-13 20:56:29,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:56:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 20:56:29,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:30,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:30,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:30,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 61 [2021-07-13 20:56:30,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-13 20:56:30,315 INFO L628 ElimStorePlain]: treesize reduction 242, result has 13.3 percent of original size [2021-07-13 20:56:30,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:30,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:55 [2021-07-13 20:56:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:30,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713735810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:30,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:30,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-07-13 20:56:30,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313795605] [2021-07-13 20:56:30,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:56:30,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:30,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:56:30,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:56:30,456 INFO L87 Difference]: Start difference. First operand 50385 states and 195318 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:34,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:34,757 INFO L93 Difference]: Finished difference Result 78681 states and 297156 transitions. [2021-07-13 20:56:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:56:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:56:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:35,016 INFO L225 Difference]: With dead ends: 78681 [2021-07-13 20:56:35,016 INFO L226 Difference]: Without dead ends: 78666 [2021-07-13 20:56:35,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 3080.4ms TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:56:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-07-13 20:56:36,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 50388. [2021-07-13 20:56:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50388 states, 50387 states have (on average 3.876654692678667) internal successors, (195333), 50387 states have internal predecessors, (195333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50388 states to 50388 states and 195333 transitions. [2021-07-13 20:56:36,935 INFO L78 Accepts]: Start accepts. Automaton has 50388 states and 195333 transitions. Word has length 30 [2021-07-13 20:56:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:36,935 INFO L482 AbstractCegarLoop]: Abstraction has 50388 states and 195333 transitions. [2021-07-13 20:56:36,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 50388 states and 195333 transitions. [2021-07-13 20:56:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:37,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:37,026 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:37,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-07-13 20:56:37,227 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:37,228 INFO L82 PathProgramCache]: Analyzing trace with hash -590119853, now seen corresponding path program 187 times [2021-07-13 20:56:37,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:37,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726882400] [2021-07-13 20:56:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:37,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726882400] [2021-07-13 20:56:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726882400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:37,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991246551] [2021-07-13 20:56:37,466 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 [2021-07-13 20:56:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:37,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:37,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:37,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:37,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:37,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:56:37,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:56:37,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:37,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:37,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:56:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:37,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991246551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:37,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:37,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:56:37,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111904735] [2021-07-13 20:56:37,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:56:37,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:37,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:56:37,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:56:37,729 INFO L87 Difference]: Start difference. First operand 50388 states and 195333 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:38,202 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-07-13 20:56:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:39,641 INFO L93 Difference]: Finished difference Result 77532 states and 294234 transitions. [2021-07-13 20:56:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:56:39,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:56:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:39,900 INFO L225 Difference]: With dead ends: 77532 [2021-07-13 20:56:39,900 INFO L226 Difference]: Without dead ends: 77517 [2021-07-13 20:56:39,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1244.9ms TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:56:39,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77517 states. [2021-07-13 20:56:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77517 to 50404. [2021-07-13 20:56:41,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50404 states, 50403 states have (on average 3.8768724083883894) internal successors, (195406), 50403 states have internal predecessors, (195406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50404 states to 50404 states and 195406 transitions. [2021-07-13 20:56:41,609 INFO L78 Accepts]: Start accepts. Automaton has 50404 states and 195406 transitions. Word has length 30 [2021-07-13 20:56:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:41,609 INFO L482 AbstractCegarLoop]: Abstraction has 50404 states and 195406 transitions. [2021-07-13 20:56:41,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 50404 states and 195406 transitions. [2021-07-13 20:56:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:41,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:41,694 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:41,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-07-13 20:56:41,894 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2087314663, now seen corresponding path program 188 times [2021-07-13 20:56:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137303702] [2021-07-13 20:56:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:42,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:42,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137303702] [2021-07-13 20:56:42,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137303702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:42,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673557325] [2021-07-13 20:56:42,047 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 [2021-07-13 20:56:42,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:56:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:56:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:42,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:42,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2021-07-13 20:56:42,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:56:42,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:42,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:56:42,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-13 20:56:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:42,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673557325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:42,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:42,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:56:42,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403391939] [2021-07-13 20:56:42,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:56:42,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:56:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:56:42,320 INFO L87 Difference]: Start difference. First operand 50404 states and 195406 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:42,561 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-13 20:56:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:44,933 INFO L93 Difference]: Finished difference Result 79064 states and 298479 transitions. [2021-07-13 20:56:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 20:56:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 [2021-07-13 20:56:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:45,344 INFO L225 Difference]: With dead ends: 79064 [2021-07-13 20:56:45,344 INFO L226 Difference]: Without dead ends: 79034 [2021-07-13 20:56:45,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1701.5ms TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:56:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79034 states. [2021-07-13 20:56:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79034 to 50410. [2021-07-13 20:56:46,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50410 states, 50409 states have (on average 3.876986252454919) internal successors, (195435), 50409 states have internal predecessors, (195435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:46,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50410 states to 50410 states and 195435 transitions. [2021-07-13 20:56:46,838 INFO L78 Accepts]: Start accepts. Automaton has 50410 states and 195435 transitions. Word has length 30 [2021-07-13 20:56:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 50410 states and 195435 transitions. [2021-07-13 20:56:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 50410 states and 195435 transitions. [2021-07-13 20:56:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:46,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:46,928 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:47,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:47,128 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash 304550503, now seen corresponding path program 189 times [2021-07-13 20:56:47,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:47,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878670583] [2021-07-13 20:56:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:47,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878670583] [2021-07-13 20:56:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878670583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:47,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025697379] [2021-07-13 20:56:47,592 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 [2021-07-13 20:56:47,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:56:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:47,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:56:47,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:47,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:47,837 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:56:47,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:56:47,946 INFO L628 ElimStorePlain]: treesize reduction 150, result has 35.9 percent of original size [2021-07-13 20:56:47,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:56:47,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:94 [2021-07-13 20:56:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:48,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025697379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:48,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:48,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:56:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174831102] [2021-07-13 20:56:48,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:56:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:56:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:56:48,029 INFO L87 Difference]: Start difference. First operand 50410 states and 195435 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:48,726 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-07-13 20:56:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:56:51,519 INFO L93 Difference]: Finished difference Result 78571 states and 297050 transitions. [2021-07-13 20:56:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 20:56:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:56:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:56:51,918 INFO L225 Difference]: With dead ends: 78571 [2021-07-13 20:56:51,919 INFO L226 Difference]: Without dead ends: 78556 [2021-07-13 20:56:51,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2454.7ms TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:56:51,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78556 states. [2021-07-13 20:56:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78556 to 50420. [2021-07-13 20:56:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50420 states, 50419 states have (on average 3.8771296535036397) internal successors, (195481), 50419 states have internal predecessors, (195481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:56:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50420 states to 50420 states and 195481 transitions. [2021-07-13 20:56:53,464 INFO L78 Accepts]: Start accepts. Automaton has 50420 states and 195481 transitions. Word has length 30 [2021-07-13 20:56:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:56:53,464 INFO L482 AbstractCegarLoop]: Abstraction has 50420 states and 195481 transitions. [2021-07-13 20:56:53,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:56:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 50420 states and 195481 transitions. [2021-07-13 20:56:53,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:56:53,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:56:53,553 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:56:53,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:56:53,753 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:56:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:56:53,754 INFO L82 PathProgramCache]: Analyzing trace with hash 878613223, now seen corresponding path program 190 times [2021-07-13 20:56:53,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:56:53,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036305191] [2021-07-13 20:56:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:56:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:56:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:56:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036305191] [2021-07-13 20:56:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036305191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615149018] [2021-07-13 20:56:53,900 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 [2021-07-13 20:56:53,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:56:53,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:56:53,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:56:53,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:56:54,199 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-07-13 20:56:54,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:54,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:54,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:56:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:56:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:56:54,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:56:54,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:56:54,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:56:54,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:56:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:56:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615149018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:56:54,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:56:54,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:56:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050682042] [2021-07-13 20:56:54,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:56:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:56:54,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:56:54,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:56:54,455 INFO L87 Difference]: Start difference. First operand 50420 states and 195481 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:00,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:00,408 INFO L93 Difference]: Finished difference Result 96588 states and 356674 transitions. [2021-07-13 20:57:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-07-13 20:57:00,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:57:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:00,726 INFO L225 Difference]: With dead ends: 96588 [2021-07-13 20:57:00,726 INFO L226 Difference]: Without dead ends: 96543 [2021-07-13 20:57:00,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 4052.3ms TimeCoverageRelationStatistics Valid=1133, Invalid=8373, Unknown=0, NotChecked=0, Total=9506 [2021-07-13 20:57:00,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96543 states. [2021-07-13 20:57:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96543 to 50456. [2021-07-13 20:57:02,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.877653354474284) internal successors, (195647), 50455 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195647 transitions. [2021-07-13 20:57:02,677 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195647 transitions. Word has length 30 [2021-07-13 20:57:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:02,677 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195647 transitions. [2021-07-13 20:57:02,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195647 transitions. [2021-07-13 20:57:02,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:02,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:02,767 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:02,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:02,968 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash 276888099, now seen corresponding path program 191 times [2021-07-13 20:57:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:02,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819269435] [2021-07-13 20:57:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:02,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:03,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819269435] [2021-07-13 20:57:03,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819269435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:03,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190518621] [2021-07-13 20:57:03,134 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 [2021-07-13 20:57:03,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:57:03,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:03,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:57:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:03,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:03,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:03,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:03,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 37 [2021-07-13 20:57:03,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:57:03,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:03,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:57:03,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-07-13 20:57:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190518621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:03,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:03,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:57:03,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076865522] [2021-07-13 20:57:03,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:57:03,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:03,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:57:03,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:57:03,439 INFO L87 Difference]: Start difference. First operand 50456 states and 195647 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:03,759 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-07-13 20:57:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:06,085 INFO L93 Difference]: Finished difference Result 81340 states and 306603 transitions. [2021-07-13 20:57:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:57:06,086 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 [2021-07-13 20:57:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:06,351 INFO L225 Difference]: With dead ends: 81340 [2021-07-13 20:57:06,351 INFO L226 Difference]: Without dead ends: 81310 [2021-07-13 20:57:06,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1628.0ms TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:57:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81310 states. [2021-07-13 20:57:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81310 to 50462. [2021-07-13 20:57:07,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 50461 states have (on average 3.877945343928975) internal successors, (195685), 50461 states have internal predecessors, (195685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:08,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 195685 transitions. [2021-07-13 20:57:08,151 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 195685 transitions. Word has length 30 [2021-07-13 20:57:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:08,151 INFO L482 AbstractCegarLoop]: Abstraction has 50462 states and 195685 transitions. [2021-07-13 20:57:08,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 195685 transitions. [2021-07-13 20:57:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:08,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:08,245 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:08,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:08,445 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:08,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:08,445 INFO L82 PathProgramCache]: Analyzing trace with hash 297624627, now seen corresponding path program 192 times [2021-07-13 20:57:08,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:08,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84635578] [2021-07-13 20:57:08,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:08,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:08,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84635578] [2021-07-13 20:57:08,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84635578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:08,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361907714] [2021-07-13 20:57:08,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:08,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:57:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:08,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 20:57:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:08,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:08,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:08,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:08,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:08,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-07-13 20:57:08,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:57:08,981 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-07-13 20:57:08,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:08,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-07-13 20:57:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:09,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361907714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:09,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:09,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-07-13 20:57:09,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944237409] [2021-07-13 20:57:09,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:57:09,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:57:09,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:57:09,028 INFO L87 Difference]: Start difference. First operand 50462 states and 195685 transitions. Second operand has 24 states, 24 states have (on average 2.125) 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) [2021-07-13 20:57:09,270 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-07-13 20:57:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:12,280 INFO L93 Difference]: Finished difference Result 79161 states and 299995 transitions. [2021-07-13 20:57:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:57:12,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) 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 30 [2021-07-13 20:57:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:12,696 INFO L225 Difference]: With dead ends: 79161 [2021-07-13 20:57:12,696 INFO L226 Difference]: Without dead ends: 79131 [2021-07-13 20:57:12,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2217.5ms TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 20:57:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79131 states. [2021-07-13 20:57:13,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79131 to 50460. [2021-07-13 20:57:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50460 states, 50459 states have (on average 3.877960324223627) internal successors, (195678), 50459 states have internal predecessors, (195678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50460 states to 50460 states and 195678 transitions. [2021-07-13 20:57:14,195 INFO L78 Accepts]: Start accepts. Automaton has 50460 states and 195678 transitions. Word has length 30 [2021-07-13 20:57:14,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:14,195 INFO L482 AbstractCegarLoop]: Abstraction has 50460 states and 195678 transitions. [2021-07-13 20:57:14,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) 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) [2021-07-13 20:57:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 50460 states and 195678 transitions. [2021-07-13 20:57:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:14,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:14,285 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:14,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-13 20:57:14,486 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2080925591, now seen corresponding path program 193 times [2021-07-13 20:57:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:14,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580813818] [2021-07-13 20:57:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:14,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:14,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580813818] [2021-07-13 20:57:14,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580813818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:14,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951023587] [2021-07-13 20:57:14,637 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 [2021-07-13 20:57:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:57:14,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:15,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:15,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:15,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:15,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:15,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:15,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:15,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:57:15,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:57:15,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:15,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:15,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:57:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:15,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951023587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:15,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:15,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:57:15,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802285706] [2021-07-13 20:57:15,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:57:15,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:15,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:57:15,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:57:15,148 INFO L87 Difference]: Start difference. First operand 50460 states and 195678 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:16,502 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-07-13 20:57:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:20,614 INFO L93 Difference]: Finished difference Result 95802 states and 354482 transitions. [2021-07-13 20:57:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 20:57:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:57:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:20,938 INFO L225 Difference]: With dead ends: 95802 [2021-07-13 20:57:20,938 INFO L226 Difference]: Without dead ends: 95757 [2021-07-13 20:57:20,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3982.9ms TimeCoverageRelationStatistics Valid=1115, Invalid=7441, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:57:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95757 states. [2021-07-13 20:57:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95757 to 50464. [2021-07-13 20:57:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50464 states, 50463 states have (on average 3.8779898143194025) internal successors, (195695), 50463 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:22,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 195695 transitions. [2021-07-13 20:57:22,980 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 195695 transitions. Word has length 30 [2021-07-13 20:57:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:22,980 INFO L482 AbstractCegarLoop]: Abstraction has 50464 states and 195695 transitions. [2021-07-13 20:57:22,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 195695 transitions. [2021-07-13 20:57:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:23,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:23,070 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:23,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:23,271 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash -380393053, now seen corresponding path program 194 times [2021-07-13 20:57:23,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:23,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453865692] [2021-07-13 20:57:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:23,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453865692] [2021-07-13 20:57:23,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453865692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:23,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379814830] [2021-07-13 20:57:23,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:23,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:57:23,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:57:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:23,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:23,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:23,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:23,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-07-13 20:57:23,656 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:57:23,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:23,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:23,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-13 20:57:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379814830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:23,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:57:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109457763] [2021-07-13 20:57:23,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:57:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:57:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:57:23,703 INFO L87 Difference]: Start difference. First operand 50464 states and 195695 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:29,628 INFO L93 Difference]: Finished difference Result 97872 states and 363697 transitions. [2021-07-13 20:57:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-07-13 20:57:29,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:57:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:29,957 INFO L225 Difference]: With dead ends: 97872 [2021-07-13 20:57:29,958 INFO L226 Difference]: Without dead ends: 97842 [2021-07-13 20:57:29,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 3957.4ms TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:57:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97842 states. [2021-07-13 20:57:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97842 to 50467. [2021-07-13 20:57:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 3.8780565132960807) internal successors, (195710), 50466 states have internal predecessors, (195710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:32,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 195710 transitions. [2021-07-13 20:57:32,026 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 195710 transitions. Word has length 30 [2021-07-13 20:57:32,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:32,026 INFO L482 AbstractCegarLoop]: Abstraction has 50467 states and 195710 transitions. [2021-07-13 20:57:32,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 195710 transitions. [2021-07-13 20:57:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:32,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:32,117 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:32,318 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -303306601, now seen corresponding path program 195 times [2021-07-13 20:57:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060212936] [2021-07-13 20:57:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:32,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060212936] [2021-07-13 20:57:32,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060212936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:32,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150785256] [2021-07-13 20:57:32,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:32,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:57:32,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:57:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:32,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:32,814 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-07-13 20:57:32,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:57:32,926 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.9 percent of original size [2021-07-13 20:57:33,103 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-07-13 20:57:33,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:57:33,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:90 [2021-07-13 20:57:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:33,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150785256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:33,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:33,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-07-13 20:57:33,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312181431] [2021-07-13 20:57:33,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:57:33,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:57:33,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:57:33,184 INFO L87 Difference]: Start difference. First operand 50467 states and 195710 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:57:34,772 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-07-13 20:57:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:36,278 INFO L93 Difference]: Finished difference Result 73646 states and 278776 transitions. [2021-07-13 20:57:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 20:57:36,278 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 [2021-07-13 20:57:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:36,625 INFO L225 Difference]: With dead ends: 73646 [2021-07-13 20:57:36,625 INFO L226 Difference]: Without dead ends: 73631 [2021-07-13 20:57:36,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2312.5ms TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:57:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73631 states. [2021-07-13 20:57:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73631 to 50482. [2021-07-13 20:57:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 3.878171985499495) internal successors, (195774), 50481 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 195774 transitions. [2021-07-13 20:57:38,129 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 195774 transitions. Word has length 30 [2021-07-13 20:57:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:38,129 INFO L482 AbstractCegarLoop]: Abstraction has 50482 states and 195774 transitions. [2021-07-13 20:57:38,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-07-13 20:57:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 195774 transitions. [2021-07-13 20:57:38,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:38,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:38,223 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:38,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-07-13 20:57:38,424 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:38,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 270756119, now seen corresponding path program 196 times [2021-07-13 20:57:38,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:38,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27979248] [2021-07-13 20:57:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:38,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:38,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27979248] [2021-07-13 20:57:38,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27979248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:38,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489233254] [2021-07-13 20:57:38,568 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:38,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:57:38,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:38,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 20:57:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:39,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:39,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:39,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:39,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:57:39,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:57:39,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:39,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:39,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:57:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:39,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489233254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:39,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:39,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:57:39,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990052706] [2021-07-13 20:57:39,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:57:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:57:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:57:39,145 INFO L87 Difference]: Start difference. First operand 50482 states and 195774 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:40,496 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-07-13 20:57:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:44,740 INFO L93 Difference]: Finished difference Result 89554 states and 331893 transitions. [2021-07-13 20:57:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 20:57:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:57:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:45,034 INFO L225 Difference]: With dead ends: 89554 [2021-07-13 20:57:45,034 INFO L226 Difference]: Without dead ends: 89509 [2021-07-13 20:57:45,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 4212.5ms TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:57:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89509 states. [2021-07-13 20:57:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89509 to 50513. [2021-07-13 20:57:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50513 states, 50512 states have (on average 3.8782467532467533) internal successors, (195898), 50512 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50513 states to 50513 states and 195898 transitions. [2021-07-13 20:57:46,908 INFO L78 Accepts]: Start accepts. Automaton has 50513 states and 195898 transitions. Word has length 30 [2021-07-13 20:57:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:46,908 INFO L482 AbstractCegarLoop]: Abstraction has 50513 states and 195898 transitions. [2021-07-13 20:57:46,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 50513 states and 195898 transitions. [2021-07-13 20:57:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:46,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:46,997 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:47,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:57:47,198 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:47,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1364847707, now seen corresponding path program 197 times [2021-07-13 20:57:47,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:47,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818423707] [2021-07-13 20:57:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:47,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:47,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818423707] [2021-07-13 20:57:47,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818423707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:47,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610039666] [2021-07-13 20:57:47,341 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 [2021-07-13 20:57:47,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:57:47,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:57:47,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:47,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:47,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:47,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-07-13 20:57:47,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:57:47,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:47,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:47,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-07-13 20:57:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:47,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610039666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:47,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:47,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:57:47,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411666794] [2021-07-13 20:57:47,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:57:47,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:47,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:57:47,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:57:47,598 INFO L87 Difference]: Start difference. First operand 50513 states and 195898 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:47,895 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-07-13 20:57:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:57:54,037 INFO L93 Difference]: Finished difference Result 88714 states and 329526 transitions. [2021-07-13 20:57:54,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-07-13 20:57:54,038 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:57:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:57:54,324 INFO L225 Difference]: With dead ends: 88714 [2021-07-13 20:57:54,324 INFO L226 Difference]: Without dead ends: 88684 [2021-07-13 20:57:54,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4276.4ms TimeCoverageRelationStatistics Valid=976, Invalid=10366, Unknown=0, NotChecked=0, Total=11342 [2021-07-13 20:57:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88684 states. [2021-07-13 20:57:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88684 to 50507. [2021-07-13 20:57:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50507 states, 50506 states have (on average 3.8780936918385933) internal successors, (195867), 50506 states have internal predecessors, (195867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50507 states to 50507 states and 195867 transitions. [2021-07-13 20:57:56,110 INFO L78 Accepts]: Start accepts. Automaton has 50507 states and 195867 transitions. Word has length 30 [2021-07-13 20:57:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:57:56,110 INFO L482 AbstractCegarLoop]: Abstraction has 50507 states and 195867 transitions. [2021-07-13 20:57:56,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:57:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 50507 states and 195867 transitions. [2021-07-13 20:57:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:57:56,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:57:56,201 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:57:56,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-07-13 20:57:56,401 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:57:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:57:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash -781323053, now seen corresponding path program 198 times [2021-07-13 20:57:56,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:57:56,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402929577] [2021-07-13 20:57:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:57:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:57:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:56,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:57:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402929577] [2021-07-13 20:57:56,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402929577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:56,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266825322] [2021-07-13 20:57:56,538 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 [2021-07-13 20:57:56,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:57:56,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:57:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:57:56,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:57:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:56,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:56,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:56,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:57:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:57:56,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:57:56,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:57:56,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:57:56,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:57:56,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:57:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:57:56,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266825322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:57:56,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:57:56,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:57:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381069560] [2021-07-13 20:57:56,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:57:56,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:57:56,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:57:56,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:57:56,813 INFO L87 Difference]: Start difference. First operand 50507 states and 195867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:02,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:02,624 INFO L93 Difference]: Finished difference Result 99478 states and 365820 transitions. [2021-07-13 20:58:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-13 20:58:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:58:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:03,013 INFO L225 Difference]: With dead ends: 99478 [2021-07-13 20:58:03,013 INFO L226 Difference]: Without dead ends: 99448 [2021-07-13 20:58:03,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3594.7ms TimeCoverageRelationStatistics Valid=1062, Invalid=7868, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 20:58:03,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99448 states. [2021-07-13 20:58:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99448 to 50525. [2021-07-13 20:58:04,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50525 states, 50524 states have (on average 3.8780777452299895) internal successors, (195936), 50524 states have internal predecessors, (195936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50525 states to 50525 states and 195936 transitions. [2021-07-13 20:58:04,980 INFO L78 Accepts]: Start accepts. Automaton has 50525 states and 195936 transitions. Word has length 30 [2021-07-13 20:58:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:04,980 INFO L482 AbstractCegarLoop]: Abstraction has 50525 states and 195936 transitions. [2021-07-13 20:58:04,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 50525 states and 195936 transitions. [2021-07-13 20:58:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:05,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:05,073 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:05,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:05,273 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:05,274 INFO L82 PathProgramCache]: Analyzing trace with hash 25852971, now seen corresponding path program 199 times [2021-07-13 20:58:05,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:05,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485747128] [2021-07-13 20:58:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:05,623 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-07-13 20:58:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:05,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:05,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485747128] [2021-07-13 20:58:05,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485747128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:05,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103050129] [2021-07-13 20:58:05,708 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 [2021-07-13 20:58:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:58:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:05,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:05,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:58:05,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:58:05,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:05,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:05,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-07-13 20:58:05,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:05,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103050129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:05,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:05,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-13 20:58:05,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019812878] [2021-07-13 20:58:05,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:58:05,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:05,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:58:05,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:58:05,966 INFO L87 Difference]: Start difference. First operand 50525 states and 195936 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:08,027 INFO L93 Difference]: Finished difference Result 77721 states and 294719 transitions. [2021-07-13 20:58:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:58:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:58:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:08,430 INFO L225 Difference]: With dead ends: 77721 [2021-07-13 20:58:08,430 INFO L226 Difference]: Without dead ends: 77706 [2021-07-13 20:58:08,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1573.6ms TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:58:08,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77706 states. [2021-07-13 20:58:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77706 to 50552. [2021-07-13 20:58:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50552 states, 50551 states have (on average 3.878043955609187) internal successors, (196039), 50551 states have internal predecessors, (196039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50552 states to 50552 states and 196039 transitions. [2021-07-13 20:58:09,966 INFO L78 Accepts]: Start accepts. Automaton has 50552 states and 196039 transitions. Word has length 30 [2021-07-13 20:58:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:09,966 INFO L482 AbstractCegarLoop]: Abstraction has 50552 states and 196039 transitions. [2021-07-13 20:58:09,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 50552 states and 196039 transitions. [2021-07-13 20:58:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:10,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:10,297 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:10,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-07-13 20:58:10,497 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1615723347, now seen corresponding path program 200 times [2021-07-13 20:58:10,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:10,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816963516] [2021-07-13 20:58:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:10,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816963516] [2021-07-13 20:58:10,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816963516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:10,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567035970] [2021-07-13 20:58:10,718 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 [2021-07-13 20:58:10,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:58:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:58:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:10,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:10,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:10,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-07-13 20:58:10,888 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:58:10,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:10,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:10,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-07-13 20:58:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:10,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567035970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:10,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:10,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-13 20:58:10,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877116321] [2021-07-13 20:58:10,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:58:10,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:58:10,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:58:10,926 INFO L87 Difference]: Start difference. First operand 50552 states and 196039 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:13,634 INFO L93 Difference]: Finished difference Result 77561 states and 294327 transitions. [2021-07-13 20:58:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:58:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:58:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:13,890 INFO L225 Difference]: With dead ends: 77561 [2021-07-13 20:58:13,890 INFO L226 Difference]: Without dead ends: 77546 [2021-07-13 20:58:13,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1664.5ms TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 20:58:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77546 states. [2021-07-13 20:58:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77546 to 50543. [2021-07-13 20:58:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50543 states, 50542 states have (on average 3.8782596652289185) internal successors, (196015), 50542 states have internal predecessors, (196015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50543 states to 50543 states and 196015 transitions. [2021-07-13 20:58:15,571 INFO L78 Accepts]: Start accepts. Automaton has 50543 states and 196015 transitions. Word has length 30 [2021-07-13 20:58:15,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:15,572 INFO L482 AbstractCegarLoop]: Abstraction has 50543 states and 196015 transitions. [2021-07-13 20:58:15,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 50543 states and 196015 transitions. [2021-07-13 20:58:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:15,663 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:15,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:15,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:15,863 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:15,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:15,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2130621987, now seen corresponding path program 201 times [2021-07-13 20:58:15,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:15,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063665286] [2021-07-13 20:58:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:16,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063665286] [2021-07-13 20:58:16,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063665286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579979703] [2021-07-13 20:58:16,013 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 [2021-07-13 20:58:16,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:58:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:58:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:16,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:16,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 57 [2021-07-13 20:58:16,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:58:16,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:16,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:16,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-07-13 20:58:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:16,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579979703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:16,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:16,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:58:16,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406638418] [2021-07-13 20:58:16,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:58:16,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:58:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:58:16,329 INFO L87 Difference]: Start difference. First operand 50543 states and 196015 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:18,885 INFO L93 Difference]: Finished difference Result 98552 states and 363159 transitions. [2021-07-13 20:58:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:58:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:58:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:19,383 INFO L225 Difference]: With dead ends: 98552 [2021-07-13 20:58:19,384 INFO L226 Difference]: Without dead ends: 98537 [2021-07-13 20:58:19,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1356.7ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 20:58:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98537 states. [2021-07-13 20:58:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98537 to 50554. [2021-07-13 20:58:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50554 states, 50553 states have (on average 3.8781872490257747) internal successors, (196054), 50553 states have internal predecessors, (196054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:21,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50554 states to 50554 states and 196054 transitions. [2021-07-13 20:58:21,339 INFO L78 Accepts]: Start accepts. Automaton has 50554 states and 196054 transitions. Word has length 30 [2021-07-13 20:58:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:21,339 INFO L482 AbstractCegarLoop]: Abstraction has 50554 states and 196054 transitions. [2021-07-13 20:58:21,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50554 states and 196054 transitions. [2021-07-13 20:58:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:21,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:21,429 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:21,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-13 20:58:21,629 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:21,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:21,630 INFO L82 PathProgramCache]: Analyzing trace with hash 636714265, now seen corresponding path program 202 times [2021-07-13 20:58:21,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:21,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773019566] [2021-07-13 20:58:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:21,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773019566] [2021-07-13 20:58:21,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773019566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980090175] [2021-07-13 20:58:21,763 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 [2021-07-13 20:58:21,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:58:21,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:21,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-07-13 20:58:21,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:22,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:22,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:58:22,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:58:22,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:22,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:22,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2021-07-13 20:58:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980090175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:22,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:22,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-13 20:58:22,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394985478] [2021-07-13 20:58:22,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 20:58:22,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 20:58:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 20:58:22,111 INFO L87 Difference]: Start difference. First operand 50554 states and 196054 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) 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) [2021-07-13 20:58:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:26,719 INFO L93 Difference]: Finished difference Result 87806 states and 326906 transitions. [2021-07-13 20:58:26,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:58:26,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) 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 30 [2021-07-13 20:58:26,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:27,166 INFO L225 Difference]: With dead ends: 87806 [2021-07-13 20:58:27,166 INFO L226 Difference]: Without dead ends: 87758 [2021-07-13 20:58:27,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3056.9ms TimeCoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 20:58:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2021-07-13 20:58:28,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 50572. [2021-07-13 20:58:28,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50572 states, 50571 states have (on average 3.877854897075399) internal successors, (196107), 50571 states have internal predecessors, (196107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:28,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50572 states to 50572 states and 196107 transitions. [2021-07-13 20:58:28,981 INFO L78 Accepts]: Start accepts. Automaton has 50572 states and 196107 transitions. Word has length 30 [2021-07-13 20:58:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:28,981 INFO L482 AbstractCegarLoop]: Abstraction has 50572 states and 196107 transitions. [2021-07-13 20:58:28,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) 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) [2021-07-13 20:58:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 50572 states and 196107 transitions. [2021-07-13 20:58:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:29,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:29,076 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:29,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:29,276 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:29,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1155811945, now seen corresponding path program 203 times [2021-07-13 20:58:29,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:29,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313877109] [2021-07-13 20:58:29,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:29,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:29,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313877109] [2021-07-13 20:58:29,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313877109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:29,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200829530] [2021-07-13 20:58:29,412 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 [2021-07-13 20:58:29,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:58:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-13 20:58:29,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:29,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:29,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:29,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:29,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:29,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:29,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-07-13 20:58:29,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:58:29,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:29,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:29,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-07-13 20:58:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:29,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200829530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:29,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:29,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:58:29,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463349090] [2021-07-13 20:58:29,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:58:29,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:29,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:58:29,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:58:29,763 INFO L87 Difference]: Start difference. First operand 50572 states and 196107 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:30,517 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-07-13 20:58:35,304 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-07-13 20:58:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:36,101 INFO L93 Difference]: Finished difference Result 99700 states and 367419 transitions. [2021-07-13 20:58:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 20:58:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:58:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:36,461 INFO L225 Difference]: With dead ends: 99700 [2021-07-13 20:58:36,461 INFO L226 Difference]: Without dead ends: 99670 [2021-07-13 20:58:36,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4448.5ms TimeCoverageRelationStatistics Valid=1197, Invalid=7545, Unknown=0, NotChecked=0, Total=8742 [2021-07-13 20:58:36,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99670 states. [2021-07-13 20:58:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99670 to 50590. [2021-07-13 20:58:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-07-13 20:58:38,445 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-07-13 20:58:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:38,446 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-07-13 20:58:38,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-07-13 20:58:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:38,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:38,535 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:38,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:38,735 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1521622571, now seen corresponding path program 204 times [2021-07-13 20:58:38,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:38,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269873586] [2021-07-13 20:58:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:39,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:39,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269873586] [2021-07-13 20:58:39,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269873586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:39,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884648589] [2021-07-13 20:58:39,083 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 [2021-07-13 20:58:39,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:58:39,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:39,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:58:39,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:39,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:39,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 67 [2021-07-13 20:58:39,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:58:39,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:39,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:39,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-07-13 20:58:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:39,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884648589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:39,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:39,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:58:39,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977202126] [2021-07-13 20:58:39,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:58:39,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:58:39,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:58:39,398 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:44,159 INFO L93 Difference]: Finished difference Result 97442 states and 361782 transitions. [2021-07-13 20:58:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:58:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 [2021-07-13 20:58:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:44,474 INFO L225 Difference]: With dead ends: 97442 [2021-07-13 20:58:44,474 INFO L226 Difference]: Without dead ends: 97427 [2021-07-13 20:58:44,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3128.8ms TimeCoverageRelationStatistics Valid=921, Invalid=5241, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:58:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97427 states. [2021-07-13 20:58:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97427 to 50590. [2021-07-13 20:58:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-07-13 20:58:46,375 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-07-13 20:58:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:46,375 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-07-13 20:58:46,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-07-13 20:58:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:46,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:46,467 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:46,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:46,668 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -725796723, now seen corresponding path program 205 times [2021-07-13 20:58:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:46,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594627349] [2021-07-13 20:58:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:47,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:47,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594627349] [2021-07-13 20:58:47,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594627349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:47,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829724611] [2021-07-13 20:58:47,072 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 [2021-07-13 20:58:47,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:58:47,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:47,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:47,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:47,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-07-13 20:58:47,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:58:47,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:47,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:47,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-07-13 20:58:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:47,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829724611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:47,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:47,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-07-13 20:58:47,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839760689] [2021-07-13 20:58:47,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 20:58:47,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:47,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 20:58:47,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:58:47,305 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:48,395 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 20:58:48,949 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-07-13 20:58:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:50,686 INFO L93 Difference]: Finished difference Result 74459 states and 279252 transitions. [2021-07-13 20:58:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:58:50,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:58:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:50,927 INFO L225 Difference]: With dead ends: 74459 [2021-07-13 20:58:50,927 INFO L226 Difference]: Without dead ends: 74429 [2021-07-13 20:58:50,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2541.0ms TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:58:51,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2021-07-13 20:58:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 50603. [2021-07-13 20:58:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50603 states, 50602 states have (on average 3.878364491522074) internal successors, (196253), 50602 states have internal predecessors, (196253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:52,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50603 states to 50603 states and 196253 transitions. [2021-07-13 20:58:52,530 INFO L78 Accepts]: Start accepts. Automaton has 50603 states and 196253 transitions. Word has length 30 [2021-07-13 20:58:52,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:52,530 INFO L482 AbstractCegarLoop]: Abstraction has 50603 states and 196253 transitions. [2021-07-13 20:58:52,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:52,530 INFO L276 IsEmpty]: Start isEmpty. Operand 50603 states and 196253 transitions. [2021-07-13 20:58:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:52,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:52,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:58:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:52,822 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:58:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:58:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1490477859, now seen corresponding path program 206 times [2021-07-13 20:58:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:58:52,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360907273] [2021-07-13 20:58:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:58:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:58:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:52,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:58:52,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360907273] [2021-07-13 20:58:52,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360907273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:52,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593619848] [2021-07-13 20:58:52,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:58:52,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:58:52,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:58:52,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 20:58:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:58:53,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:53,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:53,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:53,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:58:53,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:58:53,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-07-13 20:58:53,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:58:53,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:58:53,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:58:53,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-07-13 20:58:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:58:53,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593619848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:58:53,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:58:53,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-13 20:58:53,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578199768] [2021-07-13 20:58:53,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 20:58:53,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:58:53,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 20:58:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-13 20:58:53,426 INFO L87 Difference]: Start difference. First operand 50603 states and 196253 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:54,867 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 20:58:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:58:57,564 INFO L93 Difference]: Finished difference Result 88595 states and 329278 transitions. [2021-07-13 20:58:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:58:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:58:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:58:57,857 INFO L225 Difference]: With dead ends: 88595 [2021-07-13 20:58:57,857 INFO L226 Difference]: Without dead ends: 88580 [2021-07-13 20:58:57,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 3008.8ms TimeCoverageRelationStatistics Valid=752, Invalid=6054, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 20:58:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88580 states. [2021-07-13 20:58:59,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88580 to 50612. [2021-07-13 20:58:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-07-13 20:58:59,627 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-07-13 20:58:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:58:59,627 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-07-13 20:58:59,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:58:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-07-13 20:58:59,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:58:59,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:58:59,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:00,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-07-13 20:59:00,160 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1594859171, now seen corresponding path program 91 times [2021-07-13 20:59:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:00,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956739769] [2021-07-13 20:59:00,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:00,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:00,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956739769] [2021-07-13 20:59:00,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956739769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:00,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620410784] [2021-07-13 20:59:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:59:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:00,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:00,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:00,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:00,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:00,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:00,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:59:00,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:59:00,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:59:00,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:59:00,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-13 20:59:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:00,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620410784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:00,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:00,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-13 20:59:00,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360448379] [2021-07-13 20:59:00,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:59:00,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:59:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:59:00,711 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:01,517 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-07-13 20:59:02,970 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-07-13 20:59:03,230 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-07-13 20:59:03,514 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-07-13 20:59:04,391 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-07-13 20:59:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:05,636 INFO L93 Difference]: Finished difference Result 64130 states and 241390 transitions. [2021-07-13 20:59:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:59:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:59:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:05,835 INFO L225 Difference]: With dead ends: 64130 [2021-07-13 20:59:05,836 INFO L226 Difference]: Without dead ends: 64115 [2021-07-13 20:59:05,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 4241.3ms TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:59:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64115 states. [2021-07-13 20:59:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64115 to 50612. [2021-07-13 20:59:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-07-13 20:59:07,298 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-07-13 20:59:07,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:07,298 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-07-13 20:59:07,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:07,298 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-07-13 20:59:07,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:59:07,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:07,391 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:07,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-07-13 20:59:07,592 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash -344679385, now seen corresponding path program 92 times [2021-07-13 20:59:07,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:07,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171746462] [2021-07-13 20:59:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:07,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171746462] [2021-07-13 20:59:07,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171746462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:07,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751292328] [2021-07-13 20:59:07,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:07,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:59:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:07,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 20:59:07,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:08,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:08,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:08,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:08,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:08,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:59:08,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-07-13 20:59:08,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:59:08,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:59:08,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:59:08,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-07-13 20:59:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:08,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751292328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:08,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:08,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-07-13 20:59:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000364285] [2021-07-13 20:59:08,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 20:59:08,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:08,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 20:59:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 20:59:08,302 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:10,430 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-07-13 20:59:10,837 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-07-13 20:59:11,687 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-07-13 20:59:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:12,982 INFO L93 Difference]: Finished difference Result 64415 states and 242251 transitions. [2021-07-13 20:59:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:59:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:59:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:13,289 INFO L225 Difference]: With dead ends: 64415 [2021-07-13 20:59:13,289 INFO L226 Difference]: Without dead ends: 64400 [2021-07-13 20:59:13,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 3842.1ms TimeCoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:59:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64400 states. [2021-07-13 20:59:14,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64400 to 50619. [2021-07-13 20:59:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50619 states, 50618 states have (on average 3.878323916393378) internal successors, (196313), 50618 states have internal predecessors, (196313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:14,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50619 states to 50619 states and 196313 transitions. [2021-07-13 20:59:14,568 INFO L78 Accepts]: Start accepts. Automaton has 50619 states and 196313 transitions. Word has length 30 [2021-07-13 20:59:14,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:14,568 INFO L482 AbstractCegarLoop]: Abstraction has 50619 states and 196313 transitions. [2021-07-13 20:59:14,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:14,568 INFO L276 IsEmpty]: Start isEmpty. Operand 50619 states and 196313 transitions. [2021-07-13 20:59:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:59:14,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:14,906 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:15,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:15,121 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1320998229, now seen corresponding path program 93 times [2021-07-13 20:59:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:15,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847030076] [2021-07-13 20:59:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:15,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847030076] [2021-07-13 20:59:15,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847030076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:15,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795840000] [2021-07-13 20:59:15,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:15,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:59:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:59:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:15,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:15,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:59:15,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-07-13 20:59:15,636 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:59:15,652 INFO L628 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2021-07-13 20:59:15,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:59:15,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2021-07-13 20:59:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:15,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795840000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:15,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:59:15,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-07-13 20:59:15,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540661700] [2021-07-13 20:59:15,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 20:59:15,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:59:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 20:59:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-07-13 20:59:15,718 INFO L87 Difference]: Start difference. First operand 50619 states and 196313 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:59:18,958 INFO L93 Difference]: Finished difference Result 88005 states and 327696 transitions. [2021-07-13 20:59:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:59:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 20:59:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:59:19,397 INFO L225 Difference]: With dead ends: 88005 [2021-07-13 20:59:19,398 INFO L226 Difference]: Without dead ends: 87990 [2021-07-13 20:59:19,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2017.5ms TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:59:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87990 states. [2021-07-13 20:59:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87990 to 50624. [2021-07-13 20:59:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50624 states, 50623 states have (on average 3.878217411058215) internal successors, (196327), 50623 states have internal predecessors, (196327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50624 states to 50624 states and 196327 transitions. [2021-07-13 20:59:21,269 INFO L78 Accepts]: Start accepts. Automaton has 50624 states and 196327 transitions. Word has length 30 [2021-07-13 20:59:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:59:21,269 INFO L482 AbstractCegarLoop]: Abstraction has 50624 states and 196327 transitions. [2021-07-13 20:59:21,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:59:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 50624 states and 196327 transitions. [2021-07-13 20:59:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 20:59:21,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:59:21,355 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:59:21,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-07-13 20:59:21,556 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:59:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:59:21,556 INFO L82 PathProgramCache]: Analyzing trace with hash 241742567, now seen corresponding path program 207 times [2021-07-13 20:59:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:59:21,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073204899] [2021-07-13 20:59:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:59:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:59:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:59:21,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:59:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073204899] [2021-07-13 20:59:21,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073204899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:59:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309646687] [2021-07-13 20:59:21,699 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:21,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:59:21,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:59:21,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 20:59:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:59:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:59:22,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:59:22,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 Received shutdown request... [2021-07-13 20:59:38,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable811,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:59:38,377 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:59:38,378 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:59:38,379 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:59:38,380 INFO L202 PluginConnector]: Adding new model sum-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:59:38 BasicIcfg [2021-07-13 20:59:38,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:59:38,380 INFO L168 Benchmark]: Toolchain (without parser) took 791257.91 ms. Allocated memory was 183.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 163.4 MB in the beginning and 4.4 GB in the end (delta: -4.2 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:59:38,380 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:59:38,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 183.5 MB. Free memory was 163.3 MB in the beginning and 161.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:59:38,380 INFO L168 Benchmark]: Boogie Preprocessor took 13.68 ms. Allocated memory is still 183.5 MB. Free memory was 161.9 MB in the beginning and 160.9 MB in the end (delta: 984.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:59:38,380 INFO L168 Benchmark]: RCFGBuilder took 282.74 ms. Allocated memory is still 183.5 MB. Free memory was 160.9 MB in the beginning and 147.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:59:38,380 INFO L168 Benchmark]: TraceAbstraction took 790937.98 ms. Allocated memory was 183.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 147.1 MB in the beginning and 4.4 GB in the end (delta: -4.2 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. [2021-07-13 20:59:38,381 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 0.10 ms. Allocated memory is still 183.5 MB. Free memory is still 164.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.76 ms. Allocated memory is still 183.5 MB. Free memory was 163.3 MB in the beginning and 161.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.68 ms. Allocated memory is still 183.5 MB. Free memory was 161.9 MB in the beginning and 160.9 MB in the end (delta: 984.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 282.74 ms. Allocated memory is still 183.5 MB. Free memory was 160.9 MB in the beginning and 147.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 790937.98 ms. Allocated memory was 183.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 147.1 MB in the beginning and 4.4 GB in the end (delta: -4.2 GB). Peak memory consumption was 4.7 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 790860.7ms, OverallIterations: 303, TraceHistogramMax: 3, EmptinessCheckTime: 13136.7ms, AutomataDifference: 414957.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 15218 SDtfs, 85989 SDslu, 127013 SDs, 0 SdLazy, 219711 SolverSat, 15239 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 100493.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20421 GetRequests, 6341 SyntacticMatches, 395 SemanticMatches, 13685 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246571 ImplicationChecksByTransitivity, 257325.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55585occurred in iteration=253, InterpolantAutomatonStates: 12060, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 195724.0ms AutomataMinimizationTime, 302 MinimizatonAttempts, 2642135 StatesRemovedByMinimization, 302 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1061.6ms SsaConstructionTime, 3214.3ms SatisfiabilityAnalysisTime, 78804.3ms InterpolantComputationTime, 16334 NumberOfCodeBlocks, 16334 NumberOfCodeBlocksAsserted, 1048 NumberOfCheckSat, 15733 ConstructedInterpolants, 416 QuantifiedInterpolants, 173170 SizeOfPredicates, 1315 NumberOfNonLiveVariables, 20644 ConjunctsInSsa, 5022 ConjunctsInUnsatCore, 601 InterpolantComputations, 3 PerfectInterpolantSequences, 1055/5634 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