/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:48:22,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:48:22,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:48:22,062 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:48:22,117 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 [2021-06-05 05:48:22,151 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:48:22,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:48:22,152 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:48:22,152 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:48:22,154 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:48:22,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:48:22,155 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:48:22,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:48:22,155 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:48:22,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:48:22,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:48:22,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:48:22,157 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:48:22,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:48:22,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:48:22,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:48:22,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:48:22,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:48:22,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:48:22,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:48:22,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:48:22,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:48:22,468 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:48:22,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:48:22,471 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:48:22,473 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:48:22,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-06-05 05:48:22,474 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-06-05 05:48:22,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:48:22,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:48:22,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:48:22,515 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:48:22,515 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:48:22,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,537 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:48:22,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:48:22,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:48:22,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:48:22,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... [2021-06-05 05:48:22,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:48:22,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:48:22,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:48:22,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:48:22,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:48:22,643 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:48:22,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:48:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:48:22,644 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:48:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:48:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:48:22,644 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:48:22,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:48:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:48:22,645 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 05:48:22,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:48:22,868 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 05:48:22,869 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 05:48:22,870 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:48:22 BoogieIcfgContainer [2021-06-05 05:48:22,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:48:22,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:48:22,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:48:22,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:48:22,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:22" (1/2) ... [2021-06-05 05:48:22,875 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3754a81a and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:48:22, skipping insertion in model container [2021-06-05 05:48:22,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:48:22" (2/2) ... [2021-06-05 05:48:22,876 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-06-05 05:48:22,897 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:48:22,897 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:48:22,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:48:22,898 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:48:22,924 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 05:48:22,941 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 05:48:22,958 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:48:22,958 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:48:22,958 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:48:22,958 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:48:22,958 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:48:22,958 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:48:22,958 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:48:22,959 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:48:22,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-06-05 05:48:23,005 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 05:48:23,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:23,013 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,013 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-06-05 05:48:23,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882430642] [2021-06-05 05:48:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:23,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882430642] [2021-06-05 05:48:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882430642] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:48:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559427510] [2021-06-05 05:48:23,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:23,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:23,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:23,230 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:23,254 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-06-05 05:48:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 05:48:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:23,263 INFO L225 Difference]: With dead ends: 42 [2021-06-05 05:48:23,263 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 05:48:23,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 05:48:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-06-05 05:48:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-06-05 05:48:23,299 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-06-05 05:48:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:23,300 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-06-05 05:48:23,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-06-05 05:48:23,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 05:48:23,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:23,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:48:23,302 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,307 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-06-05 05:48:23,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467989002] [2021-06-05 05:48:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:23,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467989002] [2021-06-05 05:48:23,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467989002] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:23,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:23,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:48:23,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148471665] [2021-06-05 05:48:23,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:23,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:23,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:23,369 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:23,377 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-06-05 05:48:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 05:48:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:23,378 INFO L225 Difference]: With dead ends: 32 [2021-06-05 05:48:23,378 INFO L226 Difference]: Without dead ends: 31 [2021-06-05 05:48:23,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-06-05 05:48:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-06-05 05:48:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-06-05 05:48:23,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-06-05 05:48:23,384 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-06-05 05:48:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:23,384 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-06-05 05:48:23,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-06-05 05:48:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:48:23,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:23,385 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:48:23,385 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-06-05 05:48:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944671194] [2021-06-05 05:48:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944671194] [2021-06-05 05:48:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944671194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707584661] [2021-06-05 05:48:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:48:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:23,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 05:48:23,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:23,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-06-05 05:48:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707584661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:23,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:48:23,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219503593] [2021-06-05 05:48:23,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:48:23,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:48:23,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:48:23,712 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:23,742 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 05:48:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:48:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:48:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:23,744 INFO L225 Difference]: With dead ends: 52 [2021-06-05 05:48:23,744 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 05:48:23,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:48:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 05:48:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-06-05 05:48:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 05:48:23,756 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-06-05 05:48:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:23,756 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 05:48:23,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 05:48:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 05:48:23,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:23,757 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:48:23,981 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-06-05 05:48:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726327848] [2021-06-05 05:48:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:23,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726327848] [2021-06-05 05:48:24,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726327848] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:24,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:24,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:48:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281623299] [2021-06-05 05:48:24,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:24,003 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:24,013 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-06-05 05:48:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 05:48:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:24,016 INFO L225 Difference]: With dead ends: 40 [2021-06-05 05:48:24,016 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 05:48:24,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 05:48:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-06-05 05:48:24,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-06-05 05:48:24,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-06-05 05:48:24,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:24,021 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-06-05 05:48:24,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-06-05 05:48:24,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 05:48:24,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:24,022 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:24,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:48:24,022 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:24,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:24,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-06-05 05:48:24,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:24,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930213487] [2021-06-05 05:48:24,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:24,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:24,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930213487] [2021-06-05 05:48:24,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930213487] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:24,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:24,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:48:24,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656555962] [2021-06-05 05:48:24,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:48:24,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:24,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:48:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:48:24,069 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:24,098 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-06-05 05:48:24,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:48:24,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 05:48:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:24,101 INFO L225 Difference]: With dead ends: 86 [2021-06-05 05:48:24,101 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 05:48:24,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:48:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 05:48:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-06-05 05:48:24,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 05:48:24,109 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-06-05 05:48:24,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:24,109 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 05:48:24,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 05:48:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:48:24,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:24,110 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:24,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:48:24,110 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:24,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:24,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-06-05 05:48:24,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:24,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091469971] [2021-06-05 05:48:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:24,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091469971] [2021-06-05 05:48:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091469971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:24,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354927604] [2021-06-05 05:48:24,137 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:24,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:48:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:24,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 05:48:24,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354927604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:24,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:24,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 05:48:24,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828335669] [2021-06-05 05:48:24,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:48:24,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:48:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:48:24,206 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:24,221 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-05 05:48:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:48:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:48:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:24,222 INFO L225 Difference]: With dead ends: 79 [2021-06-05 05:48:24,222 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 05:48:24,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:48:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 05:48:24,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 05:48:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 05:48:24,229 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-06-05 05:48:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:24,230 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 05:48:24,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 05:48:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:48:24,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:24,231 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:24,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:24,432 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-06-05 05:48:24,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:24,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124164902] [2021-06-05 05:48:24,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:24,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124164902] [2021-06-05 05:48:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124164902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903513709] [2021-06-05 05:48:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:48:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:24,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:24,820 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 37 treesize of output 19 [2021-06-05 05:48:24,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:24,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:24,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:24,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-06-05 05:48:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903513709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:24,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:24,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:48:24,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644290512] [2021-06-05 05:48:24,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:48:24,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:24,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:48:24,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:24,847 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:24,884 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-06-05 05:48:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:48:24,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:48:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:24,886 INFO L225 Difference]: With dead ends: 106 [2021-06-05 05:48:24,886 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 05:48:24,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 05:48:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-06-05 05:48:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 05:48:24,894 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-06-05 05:48:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:24,895 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 05:48:24,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 05:48:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:48:24,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:24,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,101 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-06-05 05:48:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576352775] [2021-06-05 05:48:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:25,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576352775] [2021-06-05 05:48:25,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576352775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974048698] [2021-06-05 05:48:25,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:25,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:48:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:25,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:48:25,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-06-05 05:48:25,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:25,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:25,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:25,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-06-05 05:48:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974048698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:25,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 05:48:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203219052] [2021-06-05 05:48:25,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:48:25,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:25,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:48:25,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:48:25,326 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:25,356 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-06-05 05:48:25,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:48:25,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 05:48:25,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:25,366 INFO L225 Difference]: With dead ends: 111 [2021-06-05 05:48:25,366 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 05:48:25,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:48:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 05:48:25,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-06-05 05:48:25,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-06-05 05:48:25,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-06-05 05:48:25,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,379 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-06-05 05:48:25,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,380 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-06-05 05:48:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:48:25,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,380 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,581 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-06-05 05:48:25,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023783368] [2021-06-05 05:48:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:25,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023783368] [2021-06-05 05:48:25,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023783368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392881976] [2021-06-05 05:48:25,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:25,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:48:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:48:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392881976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:25,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:48:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005929148] [2021-06-05 05:48:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:48:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:48:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:48:25,734 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:25,751 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-06-05 05:48:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:48:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:48:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:25,753 INFO L225 Difference]: With dead ends: 178 [2021-06-05 05:48:25,753 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 05:48:25,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:48:25,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 05:48:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-06-05 05:48:25,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-06-05 05:48:25,775 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-06-05 05:48:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,778 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-06-05 05:48:25,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-06-05 05:48:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:48:25,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:26,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:26,003 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-06-05 05:48:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:26,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890620731] [2021-06-05 05:48:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:26,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890620731] [2021-06-05 05:48:26,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890620731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:26,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885505070] [2021-06-05 05:48:26,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:26,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:26,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:48:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:26,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:26,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:26,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:26,421 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 54 treesize of output 24 [2021-06-05 05:48:26,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:26,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 05:48:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:26,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885505070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:26,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:26,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:48:26,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750956856] [2021-06-05 05:48:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:48:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:48:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:48:26,452 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-06-05 05:48:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:26,574 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-06-05 05:48:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:48:26,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23 [2021-06-05 05:48:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:26,575 INFO L225 Difference]: With dead ends: 229 [2021-06-05 05:48:26,576 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 05:48:26,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:48:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 05:48:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-06-05 05:48:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-06-05 05:48:26,581 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-06-05 05:48:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:26,581 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-06-05 05:48:26,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-06-05 05:48:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-06-05 05:48:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:48:26,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:26,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:26,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:26,805 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:26,806 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-06-05 05:48:26,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:26,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294620755] [2021-06-05 05:48:26,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:27,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294620755] [2021-06-05 05:48:27,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294620755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925483313] [2021-06-05 05:48:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:27,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:27,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:27,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:48:27,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:27,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:27,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,264 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 54 treesize of output 24 [2021-06-05 05:48:27,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:27,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 05:48:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:27,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925483313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:27,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:48:27,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781828739] [2021-06-05 05:48:27,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:48:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:27,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:48:27,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:48:27,289 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-06-05 05:48:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:27,386 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 05:48:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:48:27,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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 23 [2021-06-05 05:48:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:27,387 INFO L225 Difference]: With dead ends: 242 [2021-06-05 05:48:27,388 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 05:48:27,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:48:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 05:48:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-06-05 05:48:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-06-05 05:48:27,392 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-06-05 05:48:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:27,392 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-06-05 05:48:27,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 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) [2021-06-05 05:48:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-06-05 05:48:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:48:27,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:27,394 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:27,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:27,609 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:27,609 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-06-05 05:48:27,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:27,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738682033] [2021-06-05 05:48:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:27,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738682033] [2021-06-05 05:48:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738682033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309814024] [2021-06-05 05:48:27,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:27,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:48:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:48:27,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:27,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:27,960 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 54 treesize of output 24 [2021-06-05 05:48:27,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:27,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 05:48:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:27,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309814024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:27,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:48:27,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602887237] [2021-06-05 05:48:27,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:48:27,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:27,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:48:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:48:27,981 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:28,146 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-06-05 05:48:28,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:48:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:48:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:28,148 INFO L225 Difference]: With dead ends: 370 [2021-06-05 05:48:28,148 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 05:48:28,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 05:48:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 05:48:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-06-05 05:48:28,153 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-06-05 05:48:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:28,153 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-06-05 05:48:28,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-06-05 05:48:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:48:28,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:28,154 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:28,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 05:48:28,377 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-06-05 05:48:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:28,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625090920] [2021-06-05 05:48:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:28,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:28,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625090920] [2021-06-05 05:48:28,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625090920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:28,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361110918] [2021-06-05 05:48:28,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:28,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:48:28,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:28,702 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 54 treesize of output 24 [2021-06-05 05:48:28,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:28,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:28,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:28,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 05:48:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:28,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361110918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:28,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:28,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:48:28,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994502705] [2021-06-05 05:48:28,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:48:28,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:28,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:48:28,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:48:28,729 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:28,857 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-06-05 05:48:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:48:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:28,860 INFO L225 Difference]: With dead ends: 296 [2021-06-05 05:48:28,860 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 05:48:28,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:48:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 05:48:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-06-05 05:48:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-06-05 05:48:28,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-06-05 05:48:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:28,868 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-06-05 05:48:28,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-06-05 05:48:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 05:48:28,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:28,871 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:29,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:29,077 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-06-05 05:48:29,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:29,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964013197] [2021-06-05 05:48:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964013197] [2021-06-05 05:48:29,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964013197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069127274] [2021-06-05 05:48:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:29,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:29,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:48:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:29,337 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 05:48:29,337 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 54 treesize of output 24 [2021-06-05 05:48:29,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:29,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:29,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:29,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-06-05 05:48:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069127274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:29,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:48:29,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389143938] [2021-06-05 05:48:29,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:48:29,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:29,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:48:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:48:29,356 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:29,452 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-06-05 05:48:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:48:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 05:48:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:29,454 INFO L225 Difference]: With dead ends: 174 [2021-06-05 05:48:29,454 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 05:48:29,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:48:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 05:48:29,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-06-05 05:48:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-06-05 05:48:29,458 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-06-05 05:48:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:29,458 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-06-05 05:48:29,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-06-05 05:48:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 05:48:29,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:29,459 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:29,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:29,669 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-06-05 05:48:29,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:29,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048601] [2021-06-05 05:48:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:29,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048601] [2021-06-05 05:48:29,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862233818] [2021-06-05 05:48:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:29,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:29,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:29,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:48:29,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:29,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862233818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:29,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 05:48:29,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734543631] [2021-06-05 05:48:29,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:48:29,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:29,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:48:29,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:48:29,792 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:29,815 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-06-05 05:48:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:48:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 05:48:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:29,817 INFO L225 Difference]: With dead ends: 258 [2021-06-05 05:48:29,817 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 05:48:29,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:48:29,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 05:48:29,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-06-05 05:48:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-06-05 05:48:29,823 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-06-05 05:48:29,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:29,823 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-06-05 05:48:29,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,823 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-06-05 05:48:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:29,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:29,824 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:30,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:48:30,040 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:30,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:30,040 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-06-05 05:48:30,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:30,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645344177] [2021-06-05 05:48:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:30,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:30,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645344177] [2021-06-05 05:48:30,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645344177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:30,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787018935] [2021-06-05 05:48:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:30,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:30,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:30,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:30,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:30,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:30,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:30,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:30,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:30,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:30,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:30,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787018935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:30,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:30,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 05:48:30,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232902563] [2021-06-05 05:48:30,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:48:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:48:30,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:30,568 INFO L87 Difference]: Start difference. First operand 144 states and 301 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) [2021-06-05 05:48:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:30,778 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-06-05 05:48:30,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:48:30,778 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 27 [2021-06-05 05:48:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:30,780 INFO L225 Difference]: With dead ends: 412 [2021-06-05 05:48:30,780 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 05:48:30,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 05:48:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-05 05:48:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-06-05 05:48:30,786 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-06-05 05:48:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:30,786 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-06-05 05:48:30,786 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) [2021-06-05 05:48:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-06-05 05:48:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:30,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:30,788 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:30,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:48:30,993 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:30,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:30,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-06-05 05:48:30,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:30,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921072080] [2021-06-05 05:48:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:31,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:31,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921072080] [2021-06-05 05:48:31,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921072080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:31,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240821052] [2021-06-05 05:48:31,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:31,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:31,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:31,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:31,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:31,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:31,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:31,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:31,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:31,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:31,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240821052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:31,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:31,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 05:48:31,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009837879] [2021-06-05 05:48:31,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:48:31,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:48:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:31,446 INFO L87 Difference]: Start difference. First operand 186 states and 376 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) [2021-06-05 05:48:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:31,574 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-06-05 05:48:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:31,574 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 27 [2021-06-05 05:48:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:31,576 INFO L225 Difference]: With dead ends: 449 [2021-06-05 05:48:31,576 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 05:48:31,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 05:48:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-06-05 05:48:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 05:48:31,582 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 05:48:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:31,582 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 05:48:31,583 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) [2021-06-05 05:48:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 05:48:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:31,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:31,583 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:31,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:48:31,801 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:31,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-06-05 05:48:31,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:31,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939877499] [2021-06-05 05:48:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:31,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939877499] [2021-06-05 05:48:31,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939877499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:31,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993351606] [2021-06-05 05:48:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:32,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:48:32,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:32,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:32,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:32,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:32,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:32,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:32,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:32,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:32,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993351606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:32,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:32,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:48:32,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223667051] [2021-06-05 05:48:32,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:48:32,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:32,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:48:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:48:32,275 INFO L87 Difference]: Start difference. First operand 204 states and 412 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) [2021-06-05 05:48:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:32,425 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-06-05 05:48:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:32,425 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 27 [2021-06-05 05:48:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:32,427 INFO L225 Difference]: With dead ends: 418 [2021-06-05 05:48:32,427 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 05:48:32,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 263.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:48:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 05:48:32,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-06-05 05:48:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 05:48:32,433 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 05:48:32,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:32,434 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 05:48:32,434 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) [2021-06-05 05:48:32,434 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 05:48:32,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:32,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:32,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:32,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:32,657 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:32,657 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-06-05 05:48:32,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:32,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448505705] [2021-06-05 05:48:32,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:32,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448505705] [2021-06-05 05:48:32,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448505705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505062123] [2021-06-05 05:48:32,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:32,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:33,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:33,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:33,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:33,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:33,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505062123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:33,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:33,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 05:48:33,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840868797] [2021-06-05 05:48:33,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:48:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:48:33,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:33,072 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) 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) [2021-06-05 05:48:33,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:33,365 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-06-05 05:48:33,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:33,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) 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 27 [2021-06-05 05:48:33,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:33,368 INFO L225 Difference]: With dead ends: 607 [2021-06-05 05:48:33,368 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 05:48:33,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 05:48:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-06-05 05:48:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-06-05 05:48:33,374 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-06-05 05:48:33,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:33,375 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-06-05 05:48:33,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) 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) [2021-06-05 05:48:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-06-05 05:48:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:33,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:33,376 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:33,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:33,599 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:33,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-06-05 05:48:33,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:33,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303363869] [2021-06-05 05:48:33,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:33,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:33,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303363869] [2021-06-05 05:48:33,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303363869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:33,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969661779] [2021-06-05 05:48:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:33,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:33,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:33,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:33,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:34,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:34,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:34,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:34,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:34,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969661779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:34,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 05:48:34,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490710525] [2021-06-05 05:48:34,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:48:34,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:34,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:48:34,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:34,045 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:34,239 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-06-05 05:48:34,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:34,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 27 [2021-06-05 05:48:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:34,241 INFO L225 Difference]: With dead ends: 566 [2021-06-05 05:48:34,242 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 05:48:34,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 05:48:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-06-05 05:48:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-06-05 05:48:34,249 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-06-05 05:48:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:34,249 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-06-05 05:48:34,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-06-05 05:48:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:34,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:34,250 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:34,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:34,477 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-06-05 05:48:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:34,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987557084] [2021-06-05 05:48:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:34,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:34,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987557084] [2021-06-05 05:48:34,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987557084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614599438] [2021-06-05 05:48:34,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:34,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:34,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:34,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:35,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:35,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 31 [2021-06-05 05:48:35,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:35,357 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 05:48:35,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:35,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-06-05 05:48:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:35,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614599438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:35,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:35,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 05:48:35,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987987350] [2021-06-05 05:48:35,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:48:35,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:48:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:35,372 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:35,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:35,803 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-06-05 05:48:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 27 [2021-06-05 05:48:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:35,805 INFO L225 Difference]: With dead ends: 619 [2021-06-05 05:48:35,805 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 05:48:35,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 05:48:35,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-06-05 05:48:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 05:48:35,813 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 05:48:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:35,813 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 05:48:35,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 05:48:35,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:35,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:35,815 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:36,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:48:36,029 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-06-05 05:48:36,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:36,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774135832] [2021-06-05 05:48:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:36,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:36,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774135832] [2021-06-05 05:48:36,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774135832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:36,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129159816] [2021-06-05 05:48:36,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:36,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:36,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:48:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:36,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:36,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:36,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:36,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:36,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:36,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129159816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:36,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:36,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 05:48:36,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333554966] [2021-06-05 05:48:36,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:48:36,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:36,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:48:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:36,432 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-06-05 05:48:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:36,616 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-06-05 05:48:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:48:36,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 27 [2021-06-05 05:48:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:36,619 INFO L225 Difference]: With dead ends: 631 [2021-06-05 05:48:36,619 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 05:48:36,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:36,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 05:48:36,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-06-05 05:48:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 05:48:36,627 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 05:48:36,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:36,627 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 05:48:36,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-06-05 05:48:36,627 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 05:48:36,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:48:36,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:36,628 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:36,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:48:36,841 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-06-05 05:48:36,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:36,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733415908] [2021-06-05 05:48:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:37,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733415908] [2021-06-05 05:48:37,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733415908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:37,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701203622] [2021-06-05 05:48:37,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:37,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:48:37,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:37,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:48:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:37,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-06-05 05:48:37,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:37,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:37,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:37,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 05:48:37,275 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:37,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701203622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:37,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:37,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 05:48:37,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471014158] [2021-06-05 05:48:37,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:48:37,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:48:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:37,277 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-06-05 05:48:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:37,487 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-06-05 05:48:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:48:37,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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 27 [2021-06-05 05:48:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:37,489 INFO L225 Difference]: With dead ends: 654 [2021-06-05 05:48:37,489 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 05:48:37,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:48:37,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 05:48:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-06-05 05:48:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-06-05 05:48:37,501 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-06-05 05:48:37,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:37,501 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-06-05 05:48:37,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2021-06-05 05:48:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-06-05 05:48:37,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:37,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:37,502 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:37,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:48:37,724 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:37,725 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-06-05 05:48:37,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:37,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466491982] [2021-06-05 05:48:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:37,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:37,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466491982] [2021-06-05 05:48:37,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466491982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:37,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105638785] [2021-06-05 05:48:37,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:37,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:48:37,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:37,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:38,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:38,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:38,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:38,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:38,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:38,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:38,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:38,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105638785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:38,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:38,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 05:48:38,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579574858] [2021-06-05 05:48:38,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:48:38,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:38,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:48:38,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:38,293 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:38,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:38,500 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-06-05 05:48:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:38,500 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:38,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:38,502 INFO L225 Difference]: With dead ends: 666 [2021-06-05 05:48:38,502 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 05:48:38,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 05:48:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-06-05 05:48:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-06-05 05:48:38,510 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-06-05 05:48:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:38,510 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-06-05 05:48:38,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-06-05 05:48:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:38,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:38,511 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:38,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:48:38,725 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-06-05 05:48:38,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:38,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715344436] [2021-06-05 05:48:38,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:38,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:38,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715344436] [2021-06-05 05:48:38,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715344436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:38,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646129363] [2021-06-05 05:48:38,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:38,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:39,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:39,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:39,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:39,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:39,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:39,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646129363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 05:48:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729403918] [2021-06-05 05:48:39,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:48:39,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:39,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:48:39,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:48:39,310 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:39,537 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-06-05 05:48:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:39,539 INFO L225 Difference]: With dead ends: 559 [2021-06-05 05:48:39,539 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 05:48:39,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:48:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 05:48:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-06-05 05:48:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-06-05 05:48:39,546 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-06-05 05:48:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:39,546 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-06-05 05:48:39,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-06-05 05:48:39,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:39,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:39,547 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:39,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:48:39,769 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-06-05 05:48:39,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:39,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443103758] [2021-06-05 05:48:39,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:39,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:39,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443103758] [2021-06-05 05:48:39,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443103758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:39,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136386943] [2021-06-05 05:48:39,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:39,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:39,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:39,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:39,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:40,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:40,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:40,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:40,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:40,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:40,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:40,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:40,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:40,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136386943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:40,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:40,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 05:48:40,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708309872] [2021-06-05 05:48:40,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:48:40,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:40,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:48:40,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:40,308 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:40,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:40,478 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-06-05 05:48:40,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:40,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:40,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:40,479 INFO L225 Difference]: With dead ends: 724 [2021-06-05 05:48:40,480 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 05:48:40,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:40,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 05:48:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-06-05 05:48:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-06-05 05:48:40,485 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-06-05 05:48:40,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:40,485 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-06-05 05:48:40,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-06-05 05:48:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:40,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:40,486 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:40,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:40,701 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-06-05 05:48:40,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:40,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111216341] [2021-06-05 05:48:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111216341] [2021-06-05 05:48:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111216341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751630027] [2021-06-05 05:48:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:40,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:48:40,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:40,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:41,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:41,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:41,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:41,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:41,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:41,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751630027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:41,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:41,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 05:48:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850618135] [2021-06-05 05:48:41,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:48:41,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:48:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:41,271 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:41,523 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-06-05 05:48:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:41,525 INFO L225 Difference]: With dead ends: 700 [2021-06-05 05:48:41,525 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 05:48:41,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:48:41,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 05:48:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-06-05 05:48:41,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-06-05 05:48:41,532 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-06-05 05:48:41,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:41,532 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-06-05 05:48:41,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-06-05 05:48:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:41,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:41,533 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:41,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:48:41,734 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-06-05 05:48:41,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:41,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114345948] [2021-06-05 05:48:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:41,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:41,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114345948] [2021-06-05 05:48:41,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114345948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:41,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642403754] [2021-06-05 05:48:41,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:41,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:41,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:41,933 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:42,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:42,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:42,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:42,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:42,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:42,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:42,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:42,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:42,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642403754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:42,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:42,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 05:48:42,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916889915] [2021-06-05 05:48:42,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:48:42,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:42,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:48:42,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:48:42,285 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:42,585 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-06-05 05:48:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:42,586 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:42,588 INFO L225 Difference]: With dead ends: 672 [2021-06-05 05:48:42,588 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 05:48:42,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:48:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 05:48:42,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-06-05 05:48:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 05:48:42,595 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-06-05 05:48:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:42,595 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 05:48:42,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 05:48:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:42,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:42,596 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:42,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:42,809 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-06-05 05:48:42,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:42,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368088987] [2021-06-05 05:48:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:43,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:43,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368088987] [2021-06-05 05:48:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368088987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914646234] [2021-06-05 05:48:43,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:43,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:48:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:43,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 05:48:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:43,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:43,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2021-06-05 05:48:43,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:43,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:43,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:43,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-06-05 05:48:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:43,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914646234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:43,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:43,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 05:48:43,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206227680] [2021-06-05 05:48:43,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:48:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:48:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:43,487 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:44,438 INFO L93 Difference]: Finished difference Result 703 states and 1400 transitions. [2021-06-05 05:48:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:48:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:44,440 INFO L225 Difference]: With dead ends: 703 [2021-06-05 05:48:44,440 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 05:48:44,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 961.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:48:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 05:48:44,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-06-05 05:48:44,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-06-05 05:48:44,448 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-06-05 05:48:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:44,448 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-06-05 05:48:44,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-06-05 05:48:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:44,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:44,449 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:44,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:48:44,666 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-06-05 05:48:44,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:44,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541254320] [2021-06-05 05:48:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:44,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:44,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541254320] [2021-06-05 05:48:44,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541254320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:44,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960098072] [2021-06-05 05:48:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:44,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:48:44,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:44,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:45,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:45,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:45,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:45,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:45,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:45,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:45,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:45,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960098072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:45,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:45,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 05:48:45,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476108343] [2021-06-05 05:48:45,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:48:45,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:45,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:48:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:48:45,235 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:45,494 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-06-05 05:48:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:48:45,495 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:45,496 INFO L225 Difference]: With dead ends: 636 [2021-06-05 05:48:45,496 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 05:48:45,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:48:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 05:48:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-06-05 05:48:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-06-05 05:48:45,503 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-06-05 05:48:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:45,503 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-06-05 05:48:45,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-06-05 05:48:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:45,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:45,504 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:45,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:45,725 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:45,725 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-06-05 05:48:45,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:45,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213124055] [2021-06-05 05:48:45,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:45,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213124055] [2021-06-05 05:48:45,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213124055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:45,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298679275] [2021-06-05 05:48:45,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:45,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:46,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:46,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:46,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:46,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:46,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:46,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298679275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 05:48:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363547573] [2021-06-05 05:48:46,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:48:46,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:48:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:46,292 INFO L87 Difference]: Start difference. First operand 305 states and 610 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) [2021-06-05 05:48:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:46,635 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-06-05 05:48:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:48:46,635 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 31 [2021-06-05 05:48:46,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:46,637 INFO L225 Difference]: With dead ends: 779 [2021-06-05 05:48:46,637 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 05:48:46,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 524.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:48:46,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 05:48:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-06-05 05:48:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-06-05 05:48:46,643 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-06-05 05:48:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:46,643 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-06-05 05:48:46,643 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) [2021-06-05 05:48:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-06-05 05:48:46,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:46,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:46,644 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:46,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:48:46,857 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-06-05 05:48:46,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:46,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868490730] [2021-06-05 05:48:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:47,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868490730] [2021-06-05 05:48:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868490730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836743759] [2021-06-05 05:48:47,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:47,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:47,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:47,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:47,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:47,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:47,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:47,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:47,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836743759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:47,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:47,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 05:48:47,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629444663] [2021-06-05 05:48:47,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:48:47,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:48:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:47,365 INFO L87 Difference]: Start difference. First operand 352 states and 690 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) [2021-06-05 05:48:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:47,726 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-06-05 05:48:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:48:47,726 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 31 [2021-06-05 05:48:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:47,727 INFO L225 Difference]: With dead ends: 731 [2021-06-05 05:48:47,727 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 05:48:47,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:48:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 05:48:47,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 05:48:47,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-06-05 05:48:47,733 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-06-05 05:48:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:47,733 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-06-05 05:48:47,733 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) [2021-06-05 05:48:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-06-05 05:48:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:47,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:47,734 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:47,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:47,956 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:47,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-06-05 05:48:47,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:47,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122705827] [2021-06-05 05:48:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:48,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:48,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122705827] [2021-06-05 05:48:48,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122705827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:48,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462451667] [2021-06-05 05:48:48,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:48,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:48:48,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:48,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 05:48:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:48,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:48,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:48,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:48,523 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:48:48,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:48,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-06-05 05:48:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:48,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462451667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:48,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:48,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 05:48:48,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686131358] [2021-06-05 05:48:48,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:48:48,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:48,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:48:48,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:48:48,538 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:49,367 INFO L93 Difference]: Finished difference Result 858 states and 1666 transitions. [2021-06-05 05:48:49,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:48:49,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:48:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:49,370 INFO L225 Difference]: With dead ends: 858 [2021-06-05 05:48:49,370 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 05:48:49,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 804.9ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:48:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 05:48:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-06-05 05:48:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9216867469879517) internal successors, (638), 332 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-06-05 05:48:49,377 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-06-05 05:48:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:49,377 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-06-05 05:48:49,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-06-05 05:48:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:49,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:49,378 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:49,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:48:49,593 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-06-05 05:48:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:49,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646777947] [2021-06-05 05:48:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:49,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646777947] [2021-06-05 05:48:49,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646777947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739693823] [2021-06-05 05:48:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:49,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:49,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:49,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:50,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:50,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:50,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:50,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739693823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:50,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 05:48:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308731361] [2021-06-05 05:48:50,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:48:50,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:48:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:48:50,093 INFO L87 Difference]: Start difference. First operand 333 states and 638 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) 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) [2021-06-05 05:48:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:50,446 INFO L93 Difference]: Finished difference Result 821 states and 1585 transitions. [2021-06-05 05:48:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:48:50,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) 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 31 [2021-06-05 05:48:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:50,449 INFO L225 Difference]: With dead ends: 821 [2021-06-05 05:48:50,449 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 05:48:50,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:48:50,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 05:48:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-06-05 05:48:50,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.887780548628429) internal successors, (757), 401 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-06-05 05:48:50,457 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-06-05 05:48:50,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:50,457 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-06-05 05:48:50,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) 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) [2021-06-05 05:48:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-06-05 05:48:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:50,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:50,458 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:50,669 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-06-05 05:48:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869251233] [2021-06-05 05:48:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:50,835 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:50,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:50,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869251233] [2021-06-05 05:48:50,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869251233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889520358] [2021-06-05 05:48:50,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:50,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:48:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:50,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:51,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:51,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:51,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:51,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:51,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889520358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:51,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:51,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 05:48:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741984475] [2021-06-05 05:48:51,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:48:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:48:51,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:48:51,159 INFO L87 Difference]: Start difference. First operand 402 states and 757 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) 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) [2021-06-05 05:48:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:51,408 INFO L93 Difference]: Finished difference Result 762 states and 1488 transitions. [2021-06-05 05:48:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) 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 31 [2021-06-05 05:48:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:51,410 INFO L225 Difference]: With dead ends: 762 [2021-06-05 05:48:51,410 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 05:48:51,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 05:48:51,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-06-05 05:48:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.885204081632653) internal successors, (739), 392 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:51,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-06-05 05:48:51,420 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-06-05 05:48:51,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:51,420 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-06-05 05:48:51,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) 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) [2021-06-05 05:48:51,420 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-06-05 05:48:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:51,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:51,421 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:51,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:48:51,642 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:51,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-06-05 05:48:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:51,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053586958] [2021-06-05 05:48:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:51,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:51,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053586958] [2021-06-05 05:48:51,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053586958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:51,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624473206] [2021-06-05 05:48:51,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:51,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:48:51,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:51,861 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:51,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:52,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:52,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:52,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:52,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:52,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 05:48:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624473206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:52,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:52,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 05:48:52,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262201990] [2021-06-05 05:48:52,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:48:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:48:52,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:52,129 INFO L87 Difference]: Start difference. First operand 393 states and 739 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2021-06-05 05:48:52,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:52,323 INFO L93 Difference]: Finished difference Result 745 states and 1468 transitions. [2021-06-05 05:48:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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 31 [2021-06-05 05:48:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:52,325 INFO L225 Difference]: With dead ends: 745 [2021-06-05 05:48:52,325 INFO L226 Difference]: Without dead ends: 700 [2021-06-05 05:48:52,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:48:52,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-05 05:48:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-06-05 05:48:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.8934624697336562) internal successors, (782), 413 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:52,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-06-05 05:48:52,332 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-06-05 05:48:52,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:52,332 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-06-05 05:48:52,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 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) [2021-06-05 05:48:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-06-05 05:48:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:48:52,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:52,333 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:52,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:48:52,549 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:52,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-06-05 05:48:52,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:52,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758475705] [2021-06-05 05:48:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:52,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758475705] [2021-06-05 05:48:52,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758475705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:52,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619051082] [2021-06-05 05:48:52,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:52,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 05:48:52,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:53,032 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 05:48:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-06-05 05:48:53,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:53,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:53,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:53,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 05:48:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:53,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619051082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:53,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 05:48:53,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807745959] [2021-06-05 05:48:53,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:48:53,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:53,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:48:53,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:48:53,050 INFO L87 Difference]: Start difference. First operand 414 states and 782 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:53,280 INFO L93 Difference]: Finished difference Result 609 states and 1180 transitions. [2021-06-05 05:48:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:48:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 31 [2021-06-05 05:48:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:53,282 INFO L225 Difference]: With dead ends: 609 [2021-06-05 05:48:53,282 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 05:48:53,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 05:48:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-06-05 05:48:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.8976190476190475) internal successors, (797), 420 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-06-05 05:48:53,290 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-06-05 05:48:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:53,290 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-06-05 05:48:53,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-06-05 05:48:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:48:53,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:53,291 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:53,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:48:53,504 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:53,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-06-05 05:48:53,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:53,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949858546] [2021-06-05 05:48:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:53,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949858546] [2021-06-05 05:48:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949858546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158538279] [2021-06-05 05:48:53,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:53,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:53,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:48:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:53,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158538279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:53,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 05:48:53,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999258654] [2021-06-05 05:48:53,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:48:53,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:53,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:48:53,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:48:53,615 INFO L87 Difference]: Start difference. First operand 421 states and 797 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:53,636 INFO L93 Difference]: Finished difference Result 646 states and 1247 transitions. [2021-06-05 05:48:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:48:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 05:48:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:53,638 INFO L225 Difference]: With dead ends: 646 [2021-06-05 05:48:53,638 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 05:48:53,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:48:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 05:48:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-06-05 05:48:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.0037105751391464) internal successors, (1080), 539 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-06-05 05:48:53,645 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-06-05 05:48:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:53,645 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-06-05 05:48:53,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-06-05 05:48:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 05:48:53,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:53,646 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:53,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:48:53,847 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:53,847 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-06-05 05:48:53,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:53,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920014301] [2021-06-05 05:48:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:53,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:53,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920014301] [2021-06-05 05:48:53,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920014301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048873876] [2021-06-05 05:48:53,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:53,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:48:53,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:48:53,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:53,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:53,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048873876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:53,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:53,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 05:48:53,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731490399] [2021-06-05 05:48:53,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:48:53,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:48:53,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:48:53,970 INFO L87 Difference]: Start difference. First operand 540 states and 1080 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 05:48:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:54,006 INFO L93 Difference]: Finished difference Result 817 states and 1634 transitions. [2021-06-05 05:48:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:48:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 32 [2021-06-05 05:48:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:54,009 INFO L225 Difference]: With dead ends: 817 [2021-06-05 05:48:54,009 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 05:48:54,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:48:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 05:48:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-06-05 05:48:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.0256849315068495) internal successors, (1183), 584 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-06-05 05:48:54,019 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-06-05 05:48:54,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:54,019 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-06-05 05:48:54,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2021-06-05 05:48:54,020 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-06-05 05:48:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:48:54,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:54,021 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:54,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:48:54,243 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-06-05 05:48:54,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:54,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728658277] [2021-06-05 05:48:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:54,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728658277] [2021-06-05 05:48:54,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728658277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143244963] [2021-06-05 05:48:54,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:54,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:54,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:48:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:54,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:54,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:54,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:54,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:54,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:48:54,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:54,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:54,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:54,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:48:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143244963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:54,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:54,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 05:48:54,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510552683] [2021-06-05 05:48:54,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:48:54,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:54,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:48:54,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:54,891 INFO L87 Difference]: Start difference. First operand 585 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:55,214 INFO L93 Difference]: Finished difference Result 1500 states and 3118 transitions. [2021-06-05 05:48:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:48:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:48:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:55,217 INFO L225 Difference]: With dead ends: 1500 [2021-06-05 05:48:55,217 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 05:48:55,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:55,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 05:48:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-06-05 05:48:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0143769968051117) internal successors, (1261), 626 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-06-05 05:48:55,228 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-06-05 05:48:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:55,228 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-06-05 05:48:55,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-06-05 05:48:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:48:55,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:55,229 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:55,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:48:55,450 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:55,450 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-06-05 05:48:55,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:55,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697788066] [2021-06-05 05:48:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:55,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:55,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697788066] [2021-06-05 05:48:55,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697788066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:55,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953143913] [2021-06-05 05:48:55,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:55,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:48:55,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:55,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:48:55,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:56,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:56,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:48:56,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:56,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:56,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:48:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:56,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953143913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:56,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:56,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:48:56,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856544689] [2021-06-05 05:48:56,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:56,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:56,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:56,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:56,130 INFO L87 Difference]: Start difference. First operand 627 states and 1261 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:48:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:56,487 INFO L93 Difference]: Finished difference Result 1498 states and 3132 transitions. [2021-06-05 05:48:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:48:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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 35 [2021-06-05 05:48:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:56,491 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 05:48:56,491 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 05:48:56,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 480.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:56,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 05:48:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-06-05 05:48:56,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.0387453874538743) internal successors, (1105), 542 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-06-05 05:48:56,501 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-06-05 05:48:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:56,501 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-06-05 05:48:56,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:48:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-06-05 05:48:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:48:56,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:56,502 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:56,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:48:56,725 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-06-05 05:48:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:56,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776612267] [2021-06-05 05:48:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:56,938 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:56,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776612267] [2021-06-05 05:48:56,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776612267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:56,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146763563] [2021-06-05 05:48:56,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:56,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:48:56,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:56,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:48:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:57,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:57,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:48:57,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:57,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:57,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:57,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:48:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146763563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:57,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:57,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 05:48:57,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659523870] [2021-06-05 05:48:57,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:48:57,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:57,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:48:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:48:57,480 INFO L87 Difference]: Start difference. First operand 543 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:57,669 INFO L93 Difference]: Finished difference Result 1268 states and 2646 transitions. [2021-06-05 05:48:57,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:48:57,673 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:48:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:57,676 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 05:48:57,676 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 05:48:57,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:48:57,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 05:48:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-06-05 05:48:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 05:48:57,687 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 05:48:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:57,687 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 05:48:57,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 05:48:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:48:57,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:57,688 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:57,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:57,911 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:57,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:57,911 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-06-05 05:48:57,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:57,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365215097] [2021-06-05 05:48:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:58,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365215097] [2021-06-05 05:48:58,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365215097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:58,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846571196] [2021-06-05 05:48:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:58,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:48:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:58,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:58,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:58,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:48:58,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:58,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:58,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:58,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:48:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846571196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:58,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:58,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:48:58,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011375526] [2021-06-05 05:48:58,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:58,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:58,611 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:48:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:58,929 INFO L93 Difference]: Finished difference Result 1258 states and 2602 transitions. [2021-06-05 05:48:58,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:48:58,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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 35 [2021-06-05 05:48:58,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:58,933 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 05:48:58,933 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 05:48:58,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 05:48:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-06-05 05:48:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.0247349823321557) internal successors, (1146), 566 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-06-05 05:48:58,943 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-06-05 05:48:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:58,943 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-06-05 05:48:58,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:48:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-06-05 05:48:58,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:48:58,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:58,944 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:59,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:59,166 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:59,167 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-06-05 05:48:59,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:59,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890821458] [2021-06-05 05:48:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:59,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:59,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890821458] [2021-06-05 05:48:59,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890821458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:59,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537559320] [2021-06-05 05:48:59,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:59,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:59,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:48:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:59,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:59,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:48:59,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:48:59,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:48:59,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:59,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:59,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:59,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:48:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:59,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537559320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:59,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:59,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 05:48:59,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151738628] [2021-06-05 05:48:59,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:59,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:59,918 INFO L87 Difference]: Start difference. First operand 567 states and 1146 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:49:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:00,201 INFO L93 Difference]: Finished difference Result 934 states and 1907 transitions. [2021-06-05 05:49:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:49:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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 35 [2021-06-05 05:49:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:00,203 INFO L225 Difference]: With dead ends: 934 [2021-06-05 05:49:00,203 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 05:49:00,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:49:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 05:49:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-06-05 05:49:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 05:49:00,212 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 05:49:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:00,213 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 05:49:00,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) 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) [2021-06-05 05:49:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 05:49:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:00,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:00,214 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:00,433 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-06-05 05:49:00,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:00,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155926680] [2021-06-05 05:49:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:00,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155926680] [2021-06-05 05:49:00,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155926680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:00,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807411091] [2021-06-05 05:49:00,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:00,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:49:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:00,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:01,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:01,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:01,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-06-05 05:49:01,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,903 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 05:49:01,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-06-05 05:49:01,913 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:01,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807411091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:01,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:01,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 05:49:01,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032059537] [2021-06-05 05:49:01,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:49:01,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:01,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:49:01,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:49:01,914 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:09,161 INFO L93 Difference]: Finished difference Result 1198 states and 2387 transitions. [2021-06-05 05:49:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:49:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:09,164 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 05:49:09,164 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 05:49:09,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 4056.4ms TimeCoverageRelationStatistics Valid=112, Invalid=757, Unknown=1, NotChecked=0, Total=870 [2021-06-05 05:49:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 05:49:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-06-05 05:49:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.9970238095238095) internal successors, (1342), 672 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-06-05 05:49:09,174 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-06-05 05:49:09,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:09,174 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-06-05 05:49:09,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:09,174 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-06-05 05:49:09,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:09,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:09,175 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:09,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:49:09,397 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-06-05 05:49:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:09,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120618751] [2021-06-05 05:49:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:09,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120618751] [2021-06-05 05:49:09,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120618751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:09,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802418300] [2021-06-05 05:49:09,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:09,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:09,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:10,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:10,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:10,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:10,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:10,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:10,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802418300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:10,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:10,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 05:49:10,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410495306] [2021-06-05 05:49:10,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:49:10,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:49:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:49:10,192 INFO L87 Difference]: Start difference. First operand 673 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:10,433 INFO L93 Difference]: Finished difference Result 1761 states and 3634 transitions. [2021-06-05 05:49:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:49:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:10,436 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 05:49:10,436 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 05:49:10,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:49:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 05:49:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-06-05 05:49:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9855643044619422) internal successors, (1513), 762 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-06-05 05:49:10,451 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-06-05 05:49:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:10,451 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-06-05 05:49:10,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-06-05 05:49:10,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:10,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:10,452 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:10,669 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-06-05 05:49:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:10,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385758402] [2021-06-05 05:49:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:10,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:10,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385758402] [2021-06-05 05:49:10,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385758402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:10,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762730881] [2021-06-05 05:49:10,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:10,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:49:10,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:10,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:49:10,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:11,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-06-05 05:49:11,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:11,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:11,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:11,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-06-05 05:49:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:11,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762730881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:11,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:11,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 05:49:11,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890495823] [2021-06-05 05:49:11,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:11,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:11,466 INFO L87 Difference]: Start difference. First operand 763 states and 1513 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:12,612 INFO L93 Difference]: Finished difference Result 1434 states and 2903 transitions. [2021-06-05 05:49:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:49:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:12,615 INFO L225 Difference]: With dead ends: 1434 [2021-06-05 05:49:12,615 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 05:49:12,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1182.2ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:49:12,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 05:49:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-06-05 05:49:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.9862155388471179) internal successors, (1585), 798 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-06-05 05:49:12,626 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-06-05 05:49:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:12,626 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-06-05 05:49:12,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-06-05 05:49:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:12,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:12,627 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:12,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:12,845 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-06-05 05:49:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:12,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676765174] [2021-06-05 05:49:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:13,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:13,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676765174] [2021-06-05 05:49:13,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676765174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:13,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096987119] [2021-06-05 05:49:13,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:13,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:49:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:13,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:13,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:13,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:13,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:13,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:13,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096987119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:13,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:13,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:49:13,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217084018] [2021-06-05 05:49:13,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:49:13,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:13,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:49:13,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:49:13,479 INFO L87 Difference]: Start difference. First operand 799 states and 1585 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:13,803 INFO L93 Difference]: Finished difference Result 1504 states and 3031 transitions. [2021-06-05 05:49:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:49:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:13,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:13,805 INFO L225 Difference]: With dead ends: 1504 [2021-06-05 05:49:13,805 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 05:49:13,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:49:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 05:49:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-06-05 05:49:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.9903030303030302) internal successors, (1642), 825 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-06-05 05:49:13,816 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-06-05 05:49:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:13,816 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-06-05 05:49:13,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,816 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-06-05 05:49:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:13,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:13,818 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:14,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:49:14,040 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:14,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-06-05 05:49:14,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:14,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578392961] [2021-06-05 05:49:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:14,312 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:14,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:14,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578392961] [2021-06-05 05:49:14,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578392961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:14,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870902830] [2021-06-05 05:49:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:14,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:14,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:14,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:14,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:14,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:14,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:14,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:14,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:14,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:14,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:14,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870902830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:14,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:14,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 05:49:14,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345486631] [2021-06-05 05:49:14,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:49:14,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:14,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:49:14,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:49:14,717 INFO L87 Difference]: Start difference. First operand 826 states and 1642 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:15,227 INFO L93 Difference]: Finished difference Result 1685 states and 3364 transitions. [2021-06-05 05:49:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:49:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:15,229 INFO L225 Difference]: With dead ends: 1685 [2021-06-05 05:49:15,229 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 05:49:15,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 05:49:15,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-06-05 05:49:15,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.977889447236181) internal successors, (1968), 995 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-06-05 05:49:15,244 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-06-05 05:49:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:15,244 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-06-05 05:49:15,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-06-05 05:49:15,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:15,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:15,246 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:15,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:49:15,469 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:15,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:15,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-06-05 05:49:15,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:15,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160651349] [2021-06-05 05:49:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:49:15,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160651349] [2021-06-05 05:49:15,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160651349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:15,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120650956] [2021-06-05 05:49:15,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:15,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:15,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:15,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:15,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:15,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:16,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:16,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:16,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120650956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:16,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-06-05 05:49:16,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057385438] [2021-06-05 05:49:16,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:49:16,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:49:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:49:16,021 INFO L87 Difference]: Start difference. First operand 996 states and 1968 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:16,460 INFO L93 Difference]: Finished difference Result 1889 states and 3808 transitions. [2021-06-05 05:49:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:49:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:16,462 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 05:49:16,462 INFO L226 Difference]: Without dead ends: 1691 [2021-06-05 05:49:16,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 620.5ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:49:16,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-06-05 05:49:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-06-05 05:49:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.9815175097276265) internal successors, (2037), 1028 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-06-05 05:49:16,477 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-06-05 05:49:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:16,478 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-06-05 05:49:16,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-06-05 05:49:16,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:16,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:16,479 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:16,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:49:16,702 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:16,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-06-05 05:49:16,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:16,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543059588] [2021-06-05 05:49:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:16,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543059588] [2021-06-05 05:49:16,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543059588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:16,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187419505] [2021-06-05 05:49:16,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:16,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:49:16,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:16,968 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:49:16,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:17,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:17,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-06-05 05:49:17,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,507 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:49:17,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-06-05 05:49:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:17,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187419505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:17,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:17,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 05:49:17,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588385929] [2021-06-05 05:49:17,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:49:17,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:17,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:49:17,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:49:17,517 INFO L87 Difference]: Start difference. First operand 1029 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:18,371 INFO L93 Difference]: Finished difference Result 2019 states and 3995 transitions. [2021-06-05 05:49:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:49:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:18,374 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 05:49:18,374 INFO L226 Difference]: Without dead ends: 1805 [2021-06-05 05:49:18,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1038.3ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:49:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-06-05 05:49:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-06-05 05:49:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.9675153643546972) internal successors, (2241), 1139 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-06-05 05:49:18,386 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-06-05 05:49:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:18,386 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-06-05 05:49:18,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-06-05 05:49:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:18,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:18,388 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:18,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:18,595 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-06-05 05:49:18,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:18,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102878264] [2021-06-05 05:49:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:18,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:18,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102878264] [2021-06-05 05:49:18,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102878264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:18,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035485764] [2021-06-05 05:49:18,819 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 [2021-06-05 05:49:18,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:18,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:18,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:19,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:19,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:19,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:19,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:19,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:19,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:19,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035485764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:19,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:19,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 05:49:19,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811411622] [2021-06-05 05:49:19,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:49:19,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:19,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:49:19,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:49:19,181 INFO L87 Difference]: Start difference. First operand 1140 states and 2241 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:19,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:19,503 INFO L93 Difference]: Finished difference Result 2038 states and 4167 transitions. [2021-06-05 05:49:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:49:19,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 35 [2021-06-05 05:49:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:19,506 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 05:49:19,506 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 05:49:19,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:49:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 05:49:19,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-06-05 05:49:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9679376083188909) internal successors, (2271), 1154 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:19,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-06-05 05:49:19,525 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-06-05 05:49:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:19,525 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-06-05 05:49:19,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:19,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-06-05 05:49:19,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:19,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:19,527 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:19,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:19,741 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-06-05 05:49:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:19,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395175110] [2021-06-05 05:49:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:19,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395175110] [2021-06-05 05:49:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395175110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101050130] [2021-06-05 05:49:19,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:20,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 05:49:20,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:20,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:49:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:20,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:20,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 34 [2021-06-05 05:49:20,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:20,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:20,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:20,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-06-05 05:49:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:20,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101050130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:20,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:20,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 05:49:20,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156757790] [2021-06-05 05:49:20,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:20,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:20,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:20,643 INFO L87 Difference]: Start difference. First operand 1155 states and 2271 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:21,355 INFO L93 Difference]: Finished difference Result 1927 states and 3858 transitions. [2021-06-05 05:49:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:49:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:21,358 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 05:49:21,358 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 05:49:21,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 905.2ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:49:21,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 05:49:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-06-05 05:49:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9754701553556828) internal successors, (2416), 1223 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-06-05 05:49:21,376 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-06-05 05:49:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:21,376 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-06-05 05:49:21,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-06-05 05:49:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:21,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:21,378 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:21,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:49:21,600 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-06-05 05:49:21,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:21,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180484032] [2021-06-05 05:49:21,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:21,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180484032] [2021-06-05 05:49:21,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180484032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:21,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642699377] [2021-06-05 05:49:21,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:21,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 05:49:21,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:21,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:22,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:22,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:22,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:22,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:22,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:22,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642699377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:22,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:22,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-06-05 05:49:22,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761059636] [2021-06-05 05:49:22,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:49:22,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:22,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:49:22,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:49:22,190 INFO L87 Difference]: Start difference. First operand 1224 states and 2416 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:22,472 INFO L93 Difference]: Finished difference Result 2191 states and 4418 transitions. [2021-06-05 05:49:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:49:22,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:22,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:22,480 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 05:49:22,480 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 05:49:22,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:49:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 05:49:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-06-05 05:49:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 05:49:22,502 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 05:49:22,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:22,503 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 05:49:22,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 05:49:22,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:22,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:22,505 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:22,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:22,728 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-06-05 05:49:22,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:22,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135687985] [2021-06-05 05:49:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:22,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135687985] [2021-06-05 05:49:22,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135687985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:22,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632679143] [2021-06-05 05:49:22,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:23,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:23,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:23,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:23,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:23,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:23,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632679143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:23,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:23,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 05:49:23,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503888537] [2021-06-05 05:49:23,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:49:23,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:49:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:49:23,325 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:23,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:23,535 INFO L93 Difference]: Finished difference Result 1992 states and 4014 transitions. [2021-06-05 05:49:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:49:23,535 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:49:23,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:23,537 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 05:49:23,537 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 05:49:23,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:49:23,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 05:49:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-06-05 05:49:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:23,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 05:49:23,551 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 05:49:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:23,551 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 05:49:23,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 05:49:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:49:23,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:23,553 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:23,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:49:23,769 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:23,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:23,769 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-06-05 05:49:23,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:23,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012269168] [2021-06-05 05:49:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:24,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012269168] [2021-06-05 05:49:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012269168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788619600] [2021-06-05 05:49:24,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:24,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:24,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:24,391 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-06-05 05:49:24,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:24,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:24,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:24,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:24,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-06-05 05:49:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:24,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788619600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:24,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:24,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 05:49:24,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760798202] [2021-06-05 05:49:24,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:49:24,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:24,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:49:24,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:49:24,408 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-06-05 05:49:24,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:24,734 INFO L93 Difference]: Finished difference Result 1629 states and 3230 transitions. [2021-06-05 05:49:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:49:24,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 35 [2021-06-05 05:49:24,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:24,737 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 05:49:24,737 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 05:49:24,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:49:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 05:49:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-06-05 05:49:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.9724310776942355) internal successors, (2361), 1197 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-06-05 05:49:24,753 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-06-05 05:49:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:24,754 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-06-05 05:49:24,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-06-05 05:49:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-06-05 05:49:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 05:49:24,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:24,755 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:24,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:49:24,976 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-06-05 05:49:24,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:24,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937505381] [2021-06-05 05:49:24,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:25,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937505381] [2021-06-05 05:49:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937505381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561849329] [2021-06-05 05:49:25,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:25,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:49:25,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:25,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:49:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:25,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561849329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:25,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:25,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 05:49:25,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115715487] [2021-06-05 05:49:25,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:49:25,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:49:25,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:49:25,107 INFO L87 Difference]: Start difference. First operand 1198 states and 2361 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:25,137 INFO L93 Difference]: Finished difference Result 1523 states and 3015 transitions. [2021-06-05 05:49:25,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:49:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 36 [2021-06-05 05:49:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:25,139 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 05:49:25,139 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 05:49:25,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:49:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 05:49:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-06-05 05:49:25,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.9839486356340288) internal successors, (2472), 1246 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-06-05 05:49:25,152 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-06-05 05:49:25,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:25,153 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-06-05 05:49:25,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-06-05 05:49:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:49:25,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:25,154 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:25,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:49:25,354 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:25,355 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-06-05 05:49:25,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:25,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541524436] [2021-06-05 05:49:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:25,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541524436] [2021-06-05 05:49:25,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541524436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:25,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089124326] [2021-06-05 05:49:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:25,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:25,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:25,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:49:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:26,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:26,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:26,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-06-05 05:49:26,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:26,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:26,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:26,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 05:49:26,067 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:26,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089124326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:26,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:26,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 05:49:26,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480272098] [2021-06-05 05:49:26,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:49:26,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:26,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:49:26,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:49:26,068 INFO L87 Difference]: Start difference. First operand 1247 states and 2472 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-06-05 05:49:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:26,865 INFO L93 Difference]: Finished difference Result 2817 states and 5721 transitions. [2021-06-05 05:49:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:49:26,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 38 [2021-06-05 05:49:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:26,868 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 05:49:26,868 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 05:49:26,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 879.5ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 05:49:26,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-06-05 05:49:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.983582089552239) internal successors, (2658), 1340 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-06-05 05:49:26,881 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-06-05 05:49:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:26,881 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-06-05 05:49:26,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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) [2021-06-05 05:49:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-06-05 05:49:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:26,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:26,883 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:27,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:49:27,083 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-06-05 05:49:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:27,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774962493] [2021-06-05 05:49:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:27,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774962493] [2021-06-05 05:49:27,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774962493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321933128] [2021-06-05 05:49:27,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:27,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:49:27,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:27,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:49:27,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-06-05 05:49:28,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:28,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:28,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:28,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-06-05 05:49:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:28,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321933128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 05:49:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388331033] [2021-06-05 05:49:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:49:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:49:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:49:28,026 INFO L87 Difference]: Start difference. First operand 1341 states and 2658 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:29,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:29,707 INFO L93 Difference]: Finished difference Result 2819 states and 5680 transitions. [2021-06-05 05:49:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:49:29,707 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:29,709 INFO L225 Difference]: With dead ends: 2819 [2021-06-05 05:49:29,709 INFO L226 Difference]: Without dead ends: 2609 [2021-06-05 05:49:29,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1645.5ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:49:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-05 05:49:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-06-05 05:49:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.9700557103064067) internal successors, (2829), 1436 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-06-05 05:49:29,731 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-06-05 05:49:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:29,731 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-06-05 05:49:29,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-06-05 05:49:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:29,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:29,733 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:29,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:29,945 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-06-05 05:49:29,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:29,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500716563] [2021-06-05 05:49:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:30,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500716563] [2021-06-05 05:49:30,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500716563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:30,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327495198] [2021-06-05 05:49:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:30,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:49:30,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:30,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:30,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:30,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:30,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:30,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:30,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:30,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:30,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:30,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327495198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:30,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:30,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 05:49:30,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410739658] [2021-06-05 05:49:30,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:30,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:30,717 INFO L87 Difference]: Start difference. First operand 1437 states and 2829 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:31,058 INFO L93 Difference]: Finished difference Result 2311 states and 4610 transitions. [2021-06-05 05:49:31,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:49:31,058 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:31,060 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 05:49:31,060 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 05:49:31,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:31,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 05:49:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-06-05 05:49:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.969114619080302) internal successors, (2869), 1457 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-06-05 05:49:31,077 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-06-05 05:49:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:31,077 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-06-05 05:49:31,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-06-05 05:49:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:31,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:31,079 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:31,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:49:31,293 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-06-05 05:49:31,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:31,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985001664] [2021-06-05 05:49:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:31,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985001664] [2021-06-05 05:49:31,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985001664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:31,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522957121] [2021-06-05 05:49:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:31,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:32,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:32,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:32,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:32,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522957121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:32,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:32,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 05:49:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496584184] [2021-06-05 05:49:32,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:32,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:32,110 INFO L87 Difference]: Start difference. First operand 1458 states and 2869 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:32,604 INFO L93 Difference]: Finished difference Result 2400 states and 4757 transitions. [2021-06-05 05:49:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:49:32,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:32,606 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 05:49:32,606 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 05:49:32,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 829.6ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:49:32,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 05:49:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-06-05 05:49:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.9545454545454546) internal successors, (2924), 1496 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-06-05 05:49:32,622 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-06-05 05:49:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:32,622 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-06-05 05:49:32,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-06-05 05:49:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:32,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:32,624 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:32,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:32,837 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-06-05 05:49:32,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:32,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785416766] [2021-06-05 05:49:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:33,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:33,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785416766] [2021-06-05 05:49:33,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785416766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035435611] [2021-06-05 05:49:33,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:33,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:33,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:33,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:33,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:33,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:33,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:33,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:33,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035435611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:33,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 05:49:33,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839159736] [2021-06-05 05:49:33,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:33,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:33,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:33,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:33,644 INFO L87 Difference]: Start difference. First operand 1497 states and 2924 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:34,247 INFO L93 Difference]: Finished difference Result 3106 states and 6326 transitions. [2021-06-05 05:49:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:49:34,247 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:34,249 INFO L225 Difference]: With dead ends: 3106 [2021-06-05 05:49:34,249 INFO L226 Difference]: Without dead ends: 2973 [2021-06-05 05:49:34,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-06-05 05:49:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-06-05 05:49:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.9791485664639443) internal successors, (2278), 1151 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-06-05 05:49:34,268 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-06-05 05:49:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-06-05 05:49:34,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-06-05 05:49:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:34,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:34,270 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:34,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 05:49:34,492 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-06-05 05:49:34,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:34,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259463096] [2021-06-05 05:49:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:34,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:34,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259463096] [2021-06-05 05:49:34,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259463096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:34,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13608067] [2021-06-05 05:49:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:34,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:49:34,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:34,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:49:34,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:35,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:35,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:35,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:35,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13608067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:35,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:35,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 05:49:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330312129] [2021-06-05 05:49:35,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:35,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:35,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:35,308 INFO L87 Difference]: Start difference. First operand 1152 states and 2278 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:35,843 INFO L93 Difference]: Finished difference Result 2674 states and 5413 transitions. [2021-06-05 05:49:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:49:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:35,845 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 05:49:35,845 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 05:49:35,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 615.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 05:49:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-06-05 05:49:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 1.9695354150799695) internal successors, (2586), 1313 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-06-05 05:49:35,858 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-06-05 05:49:35,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:35,858 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-06-05 05:49:35,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:35,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-06-05 05:49:35,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:35,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:35,860 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:36,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:36,065 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:36,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-06-05 05:49:36,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:36,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793479287] [2021-06-05 05:49:36,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:36,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793479287] [2021-06-05 05:49:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793479287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390700911] [2021-06-05 05:49:36,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:36,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:36,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:36,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:37,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:37,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:37,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:37,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:37,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:37,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390700911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:37,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:37,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 05:49:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428869819] [2021-06-05 05:49:37,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:37,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:37,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:37,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:37,052 INFO L87 Difference]: Start difference. First operand 1314 states and 2586 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:37,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:37,604 INFO L93 Difference]: Finished difference Result 2628 states and 5306 transitions. [2021-06-05 05:49:37,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:49:37,604 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:37,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:37,606 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 05:49:37,606 INFO L226 Difference]: Without dead ends: 2562 [2021-06-05 05:49:37,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-06-05 05:49:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-06-05 05:49:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.9729299363057324) internal successors, (2478), 1256 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-06-05 05:49:37,621 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-06-05 05:49:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:37,621 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-06-05 05:49:37,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:37,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-06-05 05:49:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:37,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:37,623 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:37,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:49:37,837 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-06-05 05:49:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:37,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759726892] [2021-06-05 05:49:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:38,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:38,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759726892] [2021-06-05 05:49:38,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759726892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:38,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539819339] [2021-06-05 05:49:38,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:38,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:49:38,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:38,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:49:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:38,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:38,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:38,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:38,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:38,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:38,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:38,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:38,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539819339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:38,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:38,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 05:49:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720070362] [2021-06-05 05:49:38,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:38,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:38,684 INFO L87 Difference]: Start difference. First operand 1257 states and 2478 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:39,138 INFO L93 Difference]: Finished difference Result 1841 states and 3650 transitions. [2021-06-05 05:49:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:49:39,145 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:39,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:39,146 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 05:49:39,146 INFO L226 Difference]: Without dead ends: 1810 [2021-06-05 05:49:39,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:49:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-06-05 05:49:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-06-05 05:49:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.960202604920405) internal successors, (2709), 1382 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-06-05 05:49:39,159 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-06-05 05:49:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:39,159 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-06-05 05:49:39,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-06-05 05:49:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:39,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:39,160 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:39,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:39,361 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-06-05 05:49:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266514929] [2021-06-05 05:49:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:49:39,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266514929] [2021-06-05 05:49:39,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266514929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:39,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386800683] [2021-06-05 05:49:39,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:39,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:49:39,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:39,614 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:39,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:40,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:40,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:40,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:40,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:40,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:40,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386800683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:40,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:40,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 05:49:40,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599923373] [2021-06-05 05:49:40,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:40,181 INFO L87 Difference]: Start difference. First operand 1383 states and 2709 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:40,891 INFO L93 Difference]: Finished difference Result 2027 states and 4033 transitions. [2021-06-05 05:49:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:49:40,892 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:40,893 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 05:49:40,893 INFO L226 Difference]: Without dead ends: 1995 [2021-06-05 05:49:40,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 904.7ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:49:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-06-05 05:49:40,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-06-05 05:49:40,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.9630901287553648) internal successors, (2287), 1165 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-06-05 05:49:40,903 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-06-05 05:49:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:40,903 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-06-05 05:49:40,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-06-05 05:49:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:40,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:40,905 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:41,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:49:41,105 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:41,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-06-05 05:49:41,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:41,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829892769] [2021-06-05 05:49:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:41,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829892769] [2021-06-05 05:49:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829892769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173177300] [2021-06-05 05:49:41,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:41,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:41,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:41,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:41,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:41,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:41,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:41,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173177300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:41,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:41,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 05:49:41,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558115713] [2021-06-05 05:49:41,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:41,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:41,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:41,975 INFO L87 Difference]: Start difference. First operand 1166 states and 2287 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:42,479 INFO L93 Difference]: Finished difference Result 1981 states and 3920 transitions. [2021-06-05 05:49:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:49:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:42,480 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 05:49:42,481 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 05:49:42,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:49:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 05:49:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-06-05 05:49:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9574816026165167) internal successors, (2394), 1223 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-06-05 05:49:42,491 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-06-05 05:49:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:42,491 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-06-05 05:49:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-06-05 05:49:42,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:42,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:42,492 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:42,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:42,693 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:42,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:42,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-06-05 05:49:42,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:42,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900981527] [2021-06-05 05:49:42,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:42,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:42,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900981527] [2021-06-05 05:49:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900981527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:42,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679666483] [2021-06-05 05:49:42,947 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:42,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:43,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:43,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:43,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:43,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:43,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:43,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679666483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:43,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:43,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 05:49:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557425002] [2021-06-05 05:49:43,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:43,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:43,536 INFO L87 Difference]: Start difference. First operand 1224 states and 2394 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:44,031 INFO L93 Difference]: Finished difference Result 2349 states and 4815 transitions. [2021-06-05 05:49:44,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:49:44,031 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:44,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:44,033 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 05:49:44,033 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 05:49:44,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:44,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 05:49:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-06-05 05:49:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.9576891781936534) internal successors, (2406), 1229 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-06-05 05:49:44,044 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-06-05 05:49:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:44,044 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-06-05 05:49:44,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-06-05 05:49:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:44,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:44,046 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:44,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:49:44,246 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:44,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:44,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-06-05 05:49:44,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:44,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537327360] [2021-06-05 05:49:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:44,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:44,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537327360] [2021-06-05 05:49:44,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537327360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:44,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517588776] [2021-06-05 05:49:44,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 05:49:44,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 05:49:44,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:44,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:44,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:45,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:45,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:45,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:45,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:45,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:45,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:45,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517588776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:45,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 05:49:45,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320780995] [2021-06-05 05:49:45,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:45,130 INFO L87 Difference]: Start difference. First operand 1230 states and 2406 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:45,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:45,422 INFO L93 Difference]: Finished difference Result 2175 states and 4323 transitions. [2021-06-05 05:49:45,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:49:45,422 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:45,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:45,424 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 05:49:45,424 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 05:49:45,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 05:49:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-06-05 05:49:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.9499263622974963) internal successors, (2648), 1358 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:45,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-06-05 05:49:45,436 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-06-05 05:49:45,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:45,436 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-06-05 05:49:45,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-06-05 05:49:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:45,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:45,437 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:45,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:49:45,638 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-06-05 05:49:45,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:45,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453406047] [2021-06-05 05:49:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:45,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453406047] [2021-06-05 05:49:45,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453406047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994929058] [2021-06-05 05:49:45,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:45,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:45,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:45,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:46,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:46,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:46,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:46,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:46,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:46,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994929058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:46,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:46,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 05:49:46,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524692380] [2021-06-05 05:49:46,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:46,496 INFO L87 Difference]: Start difference. First operand 1359 states and 2648 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:46,952 INFO L93 Difference]: Finished difference Result 2695 states and 5412 transitions. [2021-06-05 05:49:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:49:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:46,954 INFO L225 Difference]: With dead ends: 2695 [2021-06-05 05:49:46,954 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 05:49:46,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 05:49:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-06-05 05:49:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.9449056603773585) internal successors, (2577), 1325 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-06-05 05:49:46,967 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-06-05 05:49:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:46,967 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-06-05 05:49:46,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-06-05 05:49:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:46,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:46,968 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:47,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:49:47,169 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-06-05 05:49:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656496160] [2021-06-05 05:49:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:47,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:47,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656496160] [2021-06-05 05:49:47,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656496160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:47,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079579536] [2021-06-05 05:49:47,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:47,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:49:47,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:47,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:49:47,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:48,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:48,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:48,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:48,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-06-05 05:49:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:48,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079579536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:48,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 05:49:48,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075668840] [2021-06-05 05:49:48,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:49:48,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:48,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:49:48,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:49:48,046 INFO L87 Difference]: Start difference. First operand 1326 states and 2577 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:48,500 INFO L93 Difference]: Finished difference Result 2530 states and 5090 transitions. [2021-06-05 05:49:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:49:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:48,502 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 05:49:48,502 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 05:49:48,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:49:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 05:49:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-06-05 05:49:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.9445255474452554) internal successors, (2664), 1370 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-06-05 05:49:48,514 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-06-05 05:49:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:48,514 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-06-05 05:49:48,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-06-05 05:49:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:48,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:48,515 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:48,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:48,716 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:48,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-06-05 05:49:48,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:48,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219068834] [2021-06-05 05:49:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:49,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:49,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219068834] [2021-06-05 05:49:49,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219068834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:49,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965983915] [2021-06-05 05:49:49,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:49,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:49:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:49,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:49,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:49,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:49,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:49,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:49,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:49,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:49,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:49,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965983915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:49,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:49,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 05:49:49,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472497407] [2021-06-05 05:49:49,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:49,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:49,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:49,608 INFO L87 Difference]: Start difference. First operand 1371 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:49,893 INFO L93 Difference]: Finished difference Result 1989 states and 3938 transitions. [2021-06-05 05:49:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:49:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:49,895 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 05:49:49,895 INFO L226 Difference]: Without dead ends: 1967 [2021-06-05 05:49:49,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 664.1ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-05 05:49:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-06-05 05:49:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.9446467589220684) internal successors, (2670), 1373 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-06-05 05:49:49,906 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-06-05 05:49:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:49,906 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-06-05 05:49:49,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-06-05 05:49:49,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:49,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:49,907 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:50,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:50,108 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-06-05 05:49:50,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:50,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164007583] [2021-06-05 05:49:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:50,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164007583] [2021-06-05 05:49:50,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164007583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:50,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966171535] [2021-06-05 05:49:50,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:50,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:50,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:50,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:50,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:50,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:50,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:50,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:50,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:51,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966171535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:51,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:51,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 05:49:51,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016352573] [2021-06-05 05:49:51,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:51,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:51,005 INFO L87 Difference]: Start difference. First operand 1374 states and 2670 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:51,555 INFO L93 Difference]: Finished difference Result 3158 states and 6442 transitions. [2021-06-05 05:49:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:49:51,556 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:51,558 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 05:49:51,558 INFO L226 Difference]: Without dead ends: 3018 [2021-06-05 05:49:51,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 708.3ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-06-05 05:49:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-06-05 05:49:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.013853904282116) internal successors, (1599), 794 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-06-05 05:49:51,574 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-06-05 05:49:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:51,575 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-06-05 05:49:51,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-06-05 05:49:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:51,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:51,576 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:51,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:51,781 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-06-05 05:49:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:51,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927976076] [2021-06-05 05:49:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927976076] [2021-06-05 05:49:52,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927976076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758343614] [2021-06-05 05:49:52,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:52,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:52,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:52,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:52,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:52,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:52,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:52,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:52,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:52,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:52,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758343614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:52,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:52,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 05:49:52,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041548920] [2021-06-05 05:49:52,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:52,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:52,634 INFO L87 Difference]: Start difference. First operand 795 states and 1599 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:53,343 INFO L93 Difference]: Finished difference Result 2070 states and 4261 transitions. [2021-06-05 05:49:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:49:53,343 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:53,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:53,345 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 05:49:53,345 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 05:49:53,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 661.3ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:53,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 05:49:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-06-05 05:49:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.0140127388535034) internal successors, (1581), 785 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-06-05 05:49:53,353 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-06-05 05:49:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:53,353 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-06-05 05:49:53,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,354 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-06-05 05:49:53,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:53,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:53,354 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:53,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:49:53,555 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-06-05 05:49:53,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:53,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107451283] [2021-06-05 05:49:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:53,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:53,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107451283] [2021-06-05 05:49:53,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107451283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:53,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574332757] [2021-06-05 05:49:53,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:53,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:49:53,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:53,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:53,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:54,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:54,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:54,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:54,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:54,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:54,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:54,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:54,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574332757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:54,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:54,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 05:49:54,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656532050] [2021-06-05 05:49:54,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:49:54,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:49:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:49:54,419 INFO L87 Difference]: Start difference. First operand 786 states and 1581 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:54,817 INFO L93 Difference]: Finished difference Result 1866 states and 3843 transitions. [2021-06-05 05:49:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:49:54,817 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:54,819 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 05:49:54,819 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 05:49:54,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 05:49:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-06-05 05:49:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.013906447534766) internal successors, (1593), 791 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:54,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-06-05 05:49:54,827 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-06-05 05:49:54,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:54,827 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-06-05 05:49:54,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-06-05 05:49:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:54,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:54,828 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:55,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:55,028 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-06-05 05:49:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:55,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045885440] [2021-06-05 05:49:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:55,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:55,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045885440] [2021-06-05 05:49:55,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045885440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810259706] [2021-06-05 05:49:55,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:55,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:55,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:55,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:49:55,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:55,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:49:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:49:55,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:49:55,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:55,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:55,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:55,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:49:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810259706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 05:49:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386768075] [2021-06-05 05:49:55,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:49:55,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:55,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:49:55,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:49:55,795 INFO L87 Difference]: Start difference. First operand 792 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:56,472 INFO L93 Difference]: Finished difference Result 1711 states and 3435 transitions. [2021-06-05 05:49:56,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:49:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:49:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:56,478 INFO L225 Difference]: With dead ends: 1711 [2021-06-05 05:49:56,478 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 05:49:56,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:49:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 05:49:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-06-05 05:49:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.005656108597285) internal successors, (1773), 884 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-06-05 05:49:56,488 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-06-05 05:49:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:56,488 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-06-05 05:49:56,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-06-05 05:49:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:49:56,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:56,489 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:49:56,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:56,693 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-06-05 05:49:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:56,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291340025] [2021-06-05 05:49:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:49:56,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:56,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291340025] [2021-06-05 05:49:56,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291340025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:56,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822970867] [2021-06-05 05:49:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:57,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:49:57,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:57,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:49:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:02,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:50:02,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:50:02,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2021-06-05 05:50:02,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:02,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-06-05 05:50:02,459 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:50:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822970867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:02,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:02,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 05:50:02,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280213813] [2021-06-05 05:50:02,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:50:02,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:02,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:50:02,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=962, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 05:50:02,460 INFO L87 Difference]: Start difference. First operand 885 states and 1773 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:20,244 INFO L93 Difference]: Finished difference Result 2776 states and 5550 transitions. [2021-06-05 05:51:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 05:51:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:20,247 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 05:51:20,247 INFO L226 Difference]: Without dead ends: 2481 [2021-06-05 05:51:20,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 38306.1ms TimeCoverageRelationStatistics Valid=392, Invalid=5296, Unknown=12, NotChecked=0, Total=5700 [2021-06-05 05:51:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-06-05 05:51:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-06-05 05:51:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.0136319376825704) internal successors, (2068), 1027 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-06-05 05:51:20,259 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-06-05 05:51:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:20,259 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-06-05 05:51:20,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-06-05 05:51:20,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:20,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:20,260 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:20,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:20,461 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:20,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:20,461 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-06-05 05:51:20,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:20,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993030564] [2021-06-05 05:51:20,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:20,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:20,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993030564] [2021-06-05 05:51:20,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993030564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:20,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197017737] [2021-06-05 05:51:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:20,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:51:20,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:20,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:20,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:21,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:21,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:21,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:21,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:21,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:21,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197017737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:21,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:21,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 05:51:21,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803689951] [2021-06-05 05:51:21,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:21,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:21,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:21,358 INFO L87 Difference]: Start difference. First operand 1028 states and 2068 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:21,716 INFO L93 Difference]: Finished difference Result 1646 states and 3342 transitions. [2021-06-05 05:51:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:51:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:21,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:21,718 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 05:51:21,718 INFO L226 Difference]: Without dead ends: 1624 [2021-06-05 05:51:21,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 712.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:51:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-06-05 05:51:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-06-05 05:51:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.013592233009709) internal successors, (2074), 1030 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-06-05 05:51:21,731 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-06-05 05:51:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:21,731 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-06-05 05:51:21,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-06-05 05:51:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:21,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:21,732 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:21,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:51:21,937 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:21,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-06-05 05:51:21,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:21,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981802051] [2021-06-05 05:51:21,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:22,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981802051] [2021-06-05 05:51:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981802051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:22,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740671705] [2021-06-05 05:51:22,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:22,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:22,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:22,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:22,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:22,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:22,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:22,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:22,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740671705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:22,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:22,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 05:51:22,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058834427] [2021-06-05 05:51:22,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:51:22,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:51:22,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:51:22,922 INFO L87 Difference]: Start difference. First operand 1031 states and 2074 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:23,289 INFO L93 Difference]: Finished difference Result 2173 states and 4427 transitions. [2021-06-05 05:51:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:51:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:23,291 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 05:51:23,291 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 05:51:23,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 05:51:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-06-05 05:51:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.0130963517305895) internal successors, (2152), 1069 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-06-05 05:51:23,302 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-06-05 05:51:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:23,302 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-06-05 05:51:23,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-06-05 05:51:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:23,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:23,303 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:23,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:23,504 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-06-05 05:51:23,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:23,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744569780] [2021-06-05 05:51:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:23,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:23,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744569780] [2021-06-05 05:51:23,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744569780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:23,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340932931] [2021-06-05 05:51:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:23,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:23,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:23,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:23,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:24,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:24,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:24,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:24,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:24,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340932931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:24,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:24,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 05:51:24,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022330337] [2021-06-05 05:51:24,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:51:24,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:51:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:51:24,233 INFO L87 Difference]: Start difference. First operand 1070 states and 2152 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:24,979 INFO L93 Difference]: Finished difference Result 1889 states and 3781 transitions. [2021-06-05 05:51:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:51:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:24,981 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 05:51:24,981 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 05:51:24,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:51:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 05:51:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-06-05 05:51:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.008857395925598) internal successors, (2268), 1129 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-06-05 05:51:24,990 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-06-05 05:51:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:24,990 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-06-05 05:51:24,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-06-05 05:51:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:24,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:24,991 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:51:25,192 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-06-05 05:51:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:25,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197143909] [2021-06-05 05:51:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:25,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197143909] [2021-06-05 05:51:25,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197143909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:25,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900365008] [2021-06-05 05:51:25,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:25,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:51:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:25,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:51:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:26,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:26,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-06-05 05:51:26,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:26,100 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:51:26,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:26,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 05:51:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:26,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900365008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:26,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:26,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 05:51:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144269511] [2021-06-05 05:51:26,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:51:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:51:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:51:26,110 INFO L87 Difference]: Start difference. First operand 1130 states and 2268 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:27,402 INFO L93 Difference]: Finished difference Result 2002 states and 3962 transitions. [2021-06-05 05:51:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:51:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:27,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:27,404 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 05:51:27,404 INFO L226 Difference]: Without dead ends: 1688 [2021-06-05 05:51:27,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1355.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:51:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-05 05:51:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-06-05 05:51:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.0051903114186853) internal successors, (2318), 1156 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-06-05 05:51:27,414 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-06-05 05:51:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-06-05 05:51:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-06-05 05:51:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:27,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:27,416 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:27,616 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-06-05 05:51:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330455373] [2021-06-05 05:51:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:27,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:27,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330455373] [2021-06-05 05:51:27,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330455373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:27,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133273955] [2021-06-05 05:51:27,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:27,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:27,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:27,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:28,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:28,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:28,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:28,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:28,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:28,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:28,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133273955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:28,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:28,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 05:51:28,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770421426] [2021-06-05 05:51:28,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:51:28,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:51:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:51:28,334 INFO L87 Difference]: Start difference. First operand 1157 states and 2318 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:29,079 INFO L93 Difference]: Finished difference Result 2390 states and 4766 transitions. [2021-06-05 05:51:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:51:29,079 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:29,081 INFO L225 Difference]: With dead ends: 2390 [2021-06-05 05:51:29,081 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 05:51:29,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 884.5ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:51:29,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 05:51:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-06-05 05:51:29,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.9845844504021448) internal successors, (2961), 1492 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-06-05 05:51:29,095 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-06-05 05:51:29,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:29,095 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-06-05 05:51:29,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-06-05 05:51:29,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:29,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:29,097 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:29,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:29,297 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:29,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-06-05 05:51:29,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:29,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233581070] [2021-06-05 05:51:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:29,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:29,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233581070] [2021-06-05 05:51:29,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233581070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526338089] [2021-06-05 05:51:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:29,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:51:29,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:29,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:30,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:30,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:30,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-06-05 05:51:30,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:30,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:30,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:30,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-06-05 05:51:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:30,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526338089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:30,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:30,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 05:51:30,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598523752] [2021-06-05 05:51:30,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:51:30,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:51:30,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:51:30,303 INFO L87 Difference]: Start difference. First operand 1493 states and 2961 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:32,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:32,771 INFO L93 Difference]: Finished difference Result 3509 states and 6960 transitions. [2021-06-05 05:51:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:51:32,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:32,774 INFO L225 Difference]: With dead ends: 3509 [2021-06-05 05:51:32,774 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 05:51:32,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2153.9ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:51:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 05:51:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-06-05 05:51:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.9798831927319922) internal successors, (3051), 1541 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:32,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-06-05 05:51:32,791 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-06-05 05:51:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:32,791 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-06-05 05:51:32,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:32,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-06-05 05:51:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:32,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:32,792 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:32,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:32,993 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:32,993 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-06-05 05:51:32,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:32,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740749826] [2021-06-05 05:51:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:33,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:33,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740749826] [2021-06-05 05:51:33,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740749826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:33,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458408202] [2021-06-05 05:51:33,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:33,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:51:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:33,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:33,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:33,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:33,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:33,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:33,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:33,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:33,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458408202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:33,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:33,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 05:51:33,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158062694] [2021-06-05 05:51:33,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:51:33,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:51:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:51:33,777 INFO L87 Difference]: Start difference. First operand 1542 states and 3051 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:34,042 INFO L93 Difference]: Finished difference Result 2925 states and 5994 transitions. [2021-06-05 05:51:34,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:51:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:34,045 INFO L225 Difference]: With dead ends: 2925 [2021-06-05 05:51:34,045 INFO L226 Difference]: Without dead ends: 2803 [2021-06-05 05:51:34,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 600.7ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:51:34,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-06-05 05:51:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-06-05 05:51:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 1.9800771208226222) internal successors, (3081), 1556 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-06-05 05:51:34,068 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-06-05 05:51:34,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:34,068 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-06-05 05:51:34,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-06-05 05:51:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:34,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:34,070 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:34,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:34,293 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:34,294 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-06-05 05:51:34,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:34,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587869120] [2021-06-05 05:51:34,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:34,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587869120] [2021-06-05 05:51:34,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587869120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:34,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774955645] [2021-06-05 05:51:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:34,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:34,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:34,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:35,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:35,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:35,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:35,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774955645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:35,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:35,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 05:51:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394085897] [2021-06-05 05:51:35,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:51:35,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:35,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:51:35,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:51:35,012 INFO L87 Difference]: Start difference. First operand 1557 states and 3081 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:35,698 INFO L93 Difference]: Finished difference Result 2411 states and 4790 transitions. [2021-06-05 05:51:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:51:35,698 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 39 [2021-06-05 05:51:35,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:35,700 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 05:51:35,700 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 05:51:35,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 934.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:51:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 05:51:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-06-05 05:51:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9796772265391511) internal successors, (3312), 1673 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-06-05 05:51:35,716 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-06-05 05:51:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:35,716 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-06-05 05:51:35,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-06-05 05:51:35,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:35,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:35,718 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:35,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:35,919 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:35,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-06-05 05:51:35,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:35,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780705485] [2021-06-05 05:51:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:36,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:36,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780705485] [2021-06-05 05:51:36,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780705485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:36,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130796227] [2021-06-05 05:51:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:36,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:36,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:36,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:36,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:36,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:36,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:36,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:36,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130796227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:36,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:36,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 05:51:36,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366906942] [2021-06-05 05:51:36,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:51:36,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:51:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:51:36,603 INFO L87 Difference]: Start difference. First operand 1674 states and 3312 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:37,015 INFO L93 Difference]: Finished difference Result 2847 states and 5742 transitions. [2021-06-05 05:51:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:51:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 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 39 [2021-06-05 05:51:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:37,017 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 05:51:37,017 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 05:51:37,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:51:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 05:51:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-06-05 05:51:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.9782870928829916) internal successors, (3280), 1658 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-06-05 05:51:37,037 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-06-05 05:51:37,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:37,037 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-06-05 05:51:37,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-06-05 05:51:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:37,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:37,039 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:37,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:37,239 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-06-05 05:51:37,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:37,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051799530] [2021-06-05 05:51:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:37,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:37,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051799530] [2021-06-05 05:51:37,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051799530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:37,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122987513] [2021-06-05 05:51:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:37,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:51:37,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:37,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:51:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:38,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-06-05 05:51:38,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,311 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:51:38,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 05:51:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122987513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:38,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:38,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 05:51:38,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179624189] [2021-06-05 05:51:38,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:38,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:38,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:38,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:38,322 INFO L87 Difference]: Start difference. First operand 1659 states and 3280 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:39,872 INFO L93 Difference]: Finished difference Result 3263 states and 6548 transitions. [2021-06-05 05:51:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:51:39,872 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:39,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:39,875 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 05:51:39,875 INFO L226 Difference]: Without dead ends: 3144 [2021-06-05 05:51:39,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1499.6ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:51:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-06-05 05:51:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-06-05 05:51:39,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 05:51:39,900 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 05:51:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:39,900 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 05:51:39,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 05:51:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:39,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:39,902 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:40,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:40,117 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-06-05 05:51:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:40,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823701706] [2021-06-05 05:51:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:40,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:40,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823701706] [2021-06-05 05:51:40,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823701706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:40,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149634521] [2021-06-05 05:51:40,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:40,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:40,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:40,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:40,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:40,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:40,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:40,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:40,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:40,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:40,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149634521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:40,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:40,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 05:51:40,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975945770] [2021-06-05 05:51:40,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:51:40,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:51:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:51:40,882 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:41,310 INFO L93 Difference]: Finished difference Result 3005 states and 6062 transitions. [2021-06-05 05:51:41,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:51:41,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 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 39 [2021-06-05 05:51:41,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:41,312 INFO L225 Difference]: With dead ends: 3005 [2021-06-05 05:51:41,312 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 05:51:41,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:51:41,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 05:51:41,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-06-05 05:51:41,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 05:51:41,327 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 05:51:41,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:41,327 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 05:51:41,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 05:51:41,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:51:41,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:41,329 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:41,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:51:41,529 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:41,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:41,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-06-05 05:51:41,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:41,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865029411] [2021-06-05 05:51:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:41,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:41,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865029411] [2021-06-05 05:51:41,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865029411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:41,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26380816] [2021-06-05 05:51:41,877 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:41,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:51:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:41,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 05:51:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:42,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:42,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:42,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:42,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:42,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:42,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26380816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:42,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:42,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 05:51:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889132227] [2021-06-05 05:51:42,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:51:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:51:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:51:42,344 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:42,709 INFO L93 Difference]: Finished difference Result 2585 states and 5147 transitions. [2021-06-05 05:51:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:51:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:51:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:42,711 INFO L225 Difference]: With dead ends: 2585 [2021-06-05 05:51:42,711 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 05:51:42,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:51:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 05:51:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-06-05 05:51:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.979416809605489) internal successors, (3462), 1749 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-06-05 05:51:42,725 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-06-05 05:51:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:42,725 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-06-05 05:51:42,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-06-05 05:51:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:42,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:42,727 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:42,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:42,927 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-06-05 05:51:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:42,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161050029] [2021-06-05 05:51:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:43,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:43,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161050029] [2021-06-05 05:51:43,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161050029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:43,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259684869] [2021-06-05 05:51:43,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:43,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:51:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:43,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 05:51:43,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:43,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-06-05 05:51:43,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:43,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:43,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:43,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 05:51:43,659 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:43,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259684869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:43,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:43,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-06-05 05:51:43,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157796006] [2021-06-05 05:51:43,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:51:43,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:51:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:51:43,660 INFO L87 Difference]: Start difference. First operand 1750 states and 3462 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:45,106 INFO L93 Difference]: Finished difference Result 3417 states and 6971 transitions. [2021-06-05 05:51:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:51:45,106 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:51:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:45,109 INFO L225 Difference]: With dead ends: 3417 [2021-06-05 05:51:45,109 INFO L226 Difference]: Without dead ends: 3297 [2021-06-05 05:51:45,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1391.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:51:45,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-06-05 05:51:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 1765. [2021-06-05 05:51:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.9795918367346939) internal successors, (3492), 1764 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3492 transitions. [2021-06-05 05:51:45,126 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3492 transitions. Word has length 42 [2021-06-05 05:51:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:45,126 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 3492 transitions. [2021-06-05 05:51:45,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3492 transitions. [2021-06-05 05:51:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:45,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:45,128 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:45,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:51:45,329 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:45,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:45,329 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 85 times [2021-06-05 05:51:45,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7640169] [2021-06-05 05:51:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:45,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7640169] [2021-06-05 05:51:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7640169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080641316] [2021-06-05 05:51:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:46,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:46,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:46,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:46,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:46,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:51:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:46,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080641316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:46,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:46,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 05:51:46,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063082552] [2021-06-05 05:51:46,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:51:46,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:51:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:51:46,442 INFO L87 Difference]: Start difference. First operand 1765 states and 3492 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:47,358 INFO L93 Difference]: Finished difference Result 4013 states and 8194 transitions. [2021-06-05 05:51:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:47,361 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 05:51:47,361 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 05:51:47,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 880.9ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:51:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 05:51:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 1882. [2021-06-05 05:51:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.977671451355662) internal successors, (3720), 1881 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3720 transitions. [2021-06-05 05:51:47,380 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3720 transitions. Word has length 43 [2021-06-05 05:51:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:47,380 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 3720 transitions. [2021-06-05 05:51:47,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3720 transitions. [2021-06-05 05:51:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:47,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:47,382 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:47,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:47,583 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:47,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:47,583 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 86 times [2021-06-05 05:51:47,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:47,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287101863] [2021-06-05 05:51:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:47,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287101863] [2021-06-05 05:51:47,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287101863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:47,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711712960] [2021-06-05 05:51:47,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:47,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:47,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:47,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:48,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:48,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:48,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:48,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:48,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:48,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:51:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:48,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711712960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:48,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:48,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 05:51:48,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309513278] [2021-06-05 05:51:48,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:51:48,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:48,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:51:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:51:48,631 INFO L87 Difference]: Start difference. First operand 1882 states and 3720 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:49,597 INFO L93 Difference]: Finished difference Result 3614 states and 7238 transitions. [2021-06-05 05:51:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:49,600 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 05:51:49,600 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 05:51:49,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 807.5ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:51:49,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 05:51:49,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1927. [2021-06-05 05:51:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 1.9792315680166148) internal successors, (3812), 1926 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3812 transitions. [2021-06-05 05:51:49,625 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3812 transitions. Word has length 43 [2021-06-05 05:51:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:49,626 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 3812 transitions. [2021-06-05 05:51:49,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:49,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3812 transitions. [2021-06-05 05:51:49,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:49,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:49,629 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:49,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:49,829 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 87 times [2021-06-05 05:51:49,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:49,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920685533] [2021-06-05 05:51:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:50,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:50,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920685533] [2021-06-05 05:51:50,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920685533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:50,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871541997] [2021-06-05 05:51:50,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:50,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 05:51:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:50,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:51:50,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:50,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:50,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-06-05 05:51:50,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:50,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:50,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:50,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-06-05 05:51:50,970 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:50,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871541997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:50,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:50,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:51:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231286692] [2021-06-05 05:51:50,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:51:50,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:51:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:50,970 INFO L87 Difference]: Start difference. First operand 1927 states and 3812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:51,617 INFO L93 Difference]: Finished difference Result 4338 states and 8863 transitions. [2021-06-05 05:51:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:51,617 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:51,621 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 05:51:51,621 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 05:51:51,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 910.5ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 05:51:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 1762. [2021-06-05 05:51:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9806927881885292) internal successors, (3488), 1761 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3488 transitions. [2021-06-05 05:51:51,641 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3488 transitions. Word has length 43 [2021-06-05 05:51:51,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:51,641 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3488 transitions. [2021-06-05 05:51:51,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:51,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3488 transitions. [2021-06-05 05:51:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:51,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:51,643 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:51,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:51,843 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 88 times [2021-06-05 05:51:51,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:51,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399883222] [2021-06-05 05:51:51,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:52,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399883222] [2021-06-05 05:51:52,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399883222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:52,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229915220] [2021-06-05 05:51:52,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:52,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:52,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:52,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:53,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:53,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:53,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:53,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:53,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:53,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:51:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229915220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:53,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:53,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:51:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403020832] [2021-06-05 05:51:53,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:51:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:51:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:53,107 INFO L87 Difference]: Start difference. First operand 1762 states and 3488 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:53,756 INFO L93 Difference]: Finished difference Result 3585 states and 7206 transitions. [2021-06-05 05:51:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:53,759 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 05:51:53,759 INFO L226 Difference]: Without dead ends: 3557 [2021-06-05 05:51:53,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1019.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-06-05 05:51:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 1810. [2021-06-05 05:51:53,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.9773355444997236) internal successors, (3577), 1809 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:53,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3577 transitions. [2021-06-05 05:51:53,776 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3577 transitions. Word has length 43 [2021-06-05 05:51:53,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:53,776 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3577 transitions. [2021-06-05 05:51:53,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3577 transitions. [2021-06-05 05:51:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:53,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:53,778 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:53,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:53,978 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 89 times [2021-06-05 05:51:53,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:53,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167886129] [2021-06-05 05:51:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:54,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167886129] [2021-06-05 05:51:54,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167886129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:54,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430959034] [2021-06-05 05:51:54,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:54,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:51:54,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:54,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:54,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:55,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:55,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:55,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:55,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:55,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:55,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:51:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:55,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430959034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:55,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:55,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:51:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613220073] [2021-06-05 05:51:55,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:51:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:51:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:55,125 INFO L87 Difference]: Start difference. First operand 1810 states and 3577 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:55,727 INFO L93 Difference]: Finished difference Result 3241 states and 6488 transitions. [2021-06-05 05:51:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:51:55,727 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:55,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:55,729 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 05:51:55,729 INFO L226 Difference]: Without dead ends: 3198 [2021-06-05 05:51:55,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 897.6ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:51:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-06-05 05:51:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1867. [2021-06-05 05:51:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.9715969989281887) internal successors, (3679), 1866 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3679 transitions. [2021-06-05 05:51:55,747 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3679 transitions. Word has length 43 [2021-06-05 05:51:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:55,747 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 3679 transitions. [2021-06-05 05:51:55,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3679 transitions. [2021-06-05 05:51:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:55,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:55,749 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:55,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 05:51:55,949 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-06-05 05:51:55,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:55,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041832580] [2021-06-05 05:51:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:56,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:56,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041832580] [2021-06-05 05:51:56,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041832580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:56,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309803270] [2021-06-05 05:51:56,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:56,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:51:56,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:56,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:57,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:57,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:57,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:57,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:57,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:57,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:51:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:57,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309803270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:57,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:57,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 05:51:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732337383] [2021-06-05 05:51:57,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:51:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:51:57,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:51:57,426 INFO L87 Difference]: Start difference. First operand 1867 states and 3679 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:58,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:58,266 INFO L93 Difference]: Finished difference Result 3671 states and 7373 transitions. [2021-06-05 05:51:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:51:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:51:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:58,270 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 05:51:58,270 INFO L226 Difference]: Without dead ends: 3369 [2021-06-05 05:51:58,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1160.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:51:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-06-05 05:51:58,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2005. [2021-06-05 05:51:58,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.966067864271457) internal successors, (3940), 2004 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:58,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3940 transitions. [2021-06-05 05:51:58,315 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3940 transitions. Word has length 43 [2021-06-05 05:51:58,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:58,316 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 3940 transitions. [2021-06-05 05:51:58,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:58,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3940 transitions. [2021-06-05 05:51:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:51:58,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:58,318 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:51:58,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:58,539 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:58,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:58,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-06-05 05:51:58,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:58,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062528241] [2021-06-05 05:51:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:58,990 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:58,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062528241] [2021-06-05 05:51:58,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062528241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104224089] [2021-06-05 05:51:58,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:59,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:51:59,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:59,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:59,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:51:59,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:51:59,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:00,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:00,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:00,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:52:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:00,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104224089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:00,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:00,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:52:00,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127508896] [2021-06-05 05:52:00,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:52:00,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:00,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:52:00,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:52:00,016 INFO L87 Difference]: Start difference. First operand 2005 states and 3940 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:00,638 INFO L93 Difference]: Finished difference Result 3677 states and 7454 transitions. [2021-06-05 05:52:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:52:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:52:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:00,641 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 05:52:00,641 INFO L226 Difference]: Without dead ends: 3555 [2021-06-05 05:52:00,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1139.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:52:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-06-05 05:52:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2026. [2021-06-05 05:52:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.9664197530864198) internal successors, (3982), 2025 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3982 transitions. [2021-06-05 05:52:00,658 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3982 transitions. Word has length 43 [2021-06-05 05:52:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:00,659 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 3982 transitions. [2021-06-05 05:52:00,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3982 transitions. [2021-06-05 05:52:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:52:00,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:00,660 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:00,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:52:00,861 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:00,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-06-05 05:52:00,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:00,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155445585] [2021-06-05 05:52:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:52:01,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:01,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155445585] [2021-06-05 05:52:01,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155445585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:01,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418028715] [2021-06-05 05:52:01,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:01,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:01,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:01,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:52:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:02,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:02,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:52:02,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:02,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:02,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:02,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:52:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:02,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418028715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:02,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:02,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-06-05 05:52:02,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651262512] [2021-06-05 05:52:02,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:52:02,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:02,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:52:02,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:52:02,641 INFO L87 Difference]: Start difference. First operand 2026 states and 3982 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:03,682 INFO L93 Difference]: Finished difference Result 2865 states and 5658 transitions. [2021-06-05 05:52:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:52:03,683 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:52:03,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:03,685 INFO L225 Difference]: With dead ends: 2865 [2021-06-05 05:52:03,685 INFO L226 Difference]: Without dead ends: 2573 [2021-06-05 05:52:03,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1854.7ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-06-05 05:52:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2152. [2021-06-05 05:52:03,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.9655973965597398) internal successors, (4228), 2151 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4228 transitions. [2021-06-05 05:52:03,704 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4228 transitions. Word has length 43 [2021-06-05 05:52:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:03,704 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 4228 transitions. [2021-06-05 05:52:03,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4228 transitions. [2021-06-05 05:52:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:52:03,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:03,706 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:52:03,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:03,906 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-06-05 05:52:03,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:03,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998647407] [2021-06-05 05:52:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:04,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998647407] [2021-06-05 05:52:04,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998647407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:04,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881792372] [2021-06-05 05:52:04,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:52:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:04,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 05:52:04,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:27,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:27,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 55 [2021-06-05 05:52:27,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:27,878 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-06-05 05:52:27,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:27,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:167, output treesize:7 [2021-06-05 05:52:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:27,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881792372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:27,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:27,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 05:52:27,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61866432] [2021-06-05 05:52:27,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:52:27,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:27,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:52:27,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=839, Unknown=7, NotChecked=0, Total=930 [2021-06-05 05:52:27,889 INFO L87 Difference]: Start difference. First operand 2152 states and 4228 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:43,056 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-06-05 05:52:52,394 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-06-05 05:53:13,692 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-05 05:53:33,645 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-06-05 05:54:02,252 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 05:54:27,711 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-06-05 05:54:39,059 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 05:55:00,797 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-05 05:55:22,605 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-05 05:57:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:28,884 INFO L93 Difference]: Finished difference Result 3588 states and 7132 transitions. [2021-06-05 05:57:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:57:28,917 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:28,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:28,920 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 05:57:28,920 INFO L226 Difference]: Without dead ends: 3323 [2021-06-05 05:57:28,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 95538.2ms TimeCoverageRelationStatistics Valid=196, Invalid=2037, Unknown=23, NotChecked=0, Total=2256 [2021-06-05 05:57:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-06-05 05:57:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2161. [2021-06-05 05:57:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.963425925925926) internal successors, (4241), 2160 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 4241 transitions. [2021-06-05 05:57:28,938 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 4241 transitions. Word has length 43 [2021-06-05 05:57:28,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:28,939 INFO L482 AbstractCegarLoop]: Abstraction has 2161 states and 4241 transitions. [2021-06-05 05:57:28,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 4241 transitions. [2021-06-05 05:57:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:28,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:28,940 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:29,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:29,141 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:29,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:29,141 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-06-05 05:57:29,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:29,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032872927] [2021-06-05 05:57:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:29,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032872927] [2021-06-05 05:57:29,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032872927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:29,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708218679] [2021-06-05 05:57:29,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:29,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:29,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:30,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:30,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:30,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:30,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:30,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:30,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708218679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:30,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:30,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 05:57:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283950813] [2021-06-05 05:57:30,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:57:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:57:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:30,327 INFO L87 Difference]: Start difference. First operand 2161 states and 4241 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:31,062 INFO L93 Difference]: Finished difference Result 3990 states and 7983 transitions. [2021-06-05 05:57:31,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:57:31,062 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:31,065 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 05:57:31,065 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 05:57:31,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 05:57:31,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2170. [2021-06-05 05:57:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.9594283079760257) internal successors, (4250), 2169 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4250 transitions. [2021-06-05 05:57:31,084 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4250 transitions. Word has length 43 [2021-06-05 05:57:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:31,084 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 4250 transitions. [2021-06-05 05:57:31,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4250 transitions. [2021-06-05 05:57:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:31,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:31,086 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:31,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:57:31,286 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:31,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:31,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-06-05 05:57:31,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:31,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116789375] [2021-06-05 05:57:31,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:31,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:31,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116789375] [2021-06-05 05:57:31,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116789375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:31,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299500744] [2021-06-05 05:57:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:31,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:57:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:31,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:57:31,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:32,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:32,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:32,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:32,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:32,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:32,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:32,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299500744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:32,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:32,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:57:32,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552965878] [2021-06-05 05:57:32,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:57:32,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:32,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:57:32,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:57:32,566 INFO L87 Difference]: Start difference. First operand 2170 states and 4250 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:33,173 INFO L93 Difference]: Finished difference Result 3989 states and 7996 transitions. [2021-06-05 05:57:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:57:33,173 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:33,176 INFO L225 Difference]: With dead ends: 3989 [2021-06-05 05:57:33,176 INFO L226 Difference]: Without dead ends: 3711 [2021-06-05 05:57:33,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1011.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:57:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-05 05:57:33,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2218. [2021-06-05 05:57:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 05:57:33,196 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 05:57:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:33,196 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 05:57:33,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 05:57:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:33,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:33,197 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:33,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 05:57:33,398 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-06-05 05:57:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451445733] [2021-06-05 05:57:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:33,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:33,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451445733] [2021-06-05 05:57:33,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451445733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:33,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002569569] [2021-06-05 05:57:33,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:33,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:57:33,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:33,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:33,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:34,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:34,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:34,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:34,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:34,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:34,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:34,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:34,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002569569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:34,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:34,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 05:57:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225845169] [2021-06-05 05:57:34,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:57:34,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:34,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:57:34,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:57:34,541 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:35,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:35,302 INFO L93 Difference]: Finished difference Result 3315 states and 6548 transitions. [2021-06-05 05:57:35,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:57:35,303 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:35,305 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 05:57:35,305 INFO L226 Difference]: Without dead ends: 3300 [2021-06-05 05:57:35,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 909.3ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:57:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-06-05 05:57:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2218. [2021-06-05 05:57:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 05:57:35,322 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 05:57:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:35,322 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 05:57:35,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 05:57:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:35,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:35,324 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:35,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:35,524 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-06-05 05:57:35,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:35,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014242024] [2021-06-05 05:57:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:35,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014242024] [2021-06-05 05:57:35,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014242024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:35,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665572084] [2021-06-05 05:57:35,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:35,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:35,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:36,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:36,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:36,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:36,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:36,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:36,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665572084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:36,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:36,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 05:57:36,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889479407] [2021-06-05 05:57:36,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:57:36,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:36,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:57:36,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:36,625 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:37,167 INFO L93 Difference]: Finished difference Result 4305 states and 8580 transitions. [2021-06-05 05:57:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:57:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:37,171 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 05:57:37,171 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 05:57:37,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 867.3ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 05:57:37,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2425. [2021-06-05 05:57:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.953795379537954) internal successors, (4736), 2424 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 4736 transitions. [2021-06-05 05:57:37,197 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 4736 transitions. Word has length 43 [2021-06-05 05:57:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:37,198 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 4736 transitions. [2021-06-05 05:57:37,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 4736 transitions. [2021-06-05 05:57:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:37,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:37,199 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:37,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 05:57:37,400 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:37,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:37,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-06-05 05:57:37,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:37,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913381086] [2021-06-05 05:57:37,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:37,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:37,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913381086] [2021-06-05 05:57:37,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913381086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:37,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930590020] [2021-06-05 05:57:37,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:37,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:37,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:38,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:38,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:38,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:38,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:38,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:38,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930590020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:38,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:38,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 05:57:38,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399965422] [2021-06-05 05:57:38,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:57:38,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:38,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:57:38,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:57:38,404 INFO L87 Difference]: Start difference. First operand 2425 states and 4736 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:39,517 INFO L93 Difference]: Finished difference Result 3888 states and 7643 transitions. [2021-06-05 05:57:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:57:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:39,520 INFO L225 Difference]: With dead ends: 3888 [2021-06-05 05:57:39,520 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 05:57:39,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1139.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:57:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 05:57:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2797. [2021-06-05 05:57:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 1.9549356223175967) internal successors, (5466), 2796 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 5466 transitions. [2021-06-05 05:57:39,544 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 5466 transitions. Word has length 43 [2021-06-05 05:57:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:39,544 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 5466 transitions. [2021-06-05 05:57:39,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 5466 transitions. [2021-06-05 05:57:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:39,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:39,546 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:39,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 05:57:39,746 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:39,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:39,746 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-06-05 05:57:39,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:39,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212801478] [2021-06-05 05:57:39,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:40,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:40,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212801478] [2021-06-05 05:57:40,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212801478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:40,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019763008] [2021-06-05 05:57:40,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:57:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:40,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:40,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:40,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:40,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:40,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:40,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:40,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:40,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:40,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019763008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:40,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:40,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 05:57:40,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523155295] [2021-06-05 05:57:40,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:57:40,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:57:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:40,839 INFO L87 Difference]: Start difference. First operand 2797 states and 5466 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:41,477 INFO L93 Difference]: Finished difference Result 4489 states and 9045 transitions. [2021-06-05 05:57:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:57:41,477 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:41,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:41,481 INFO L225 Difference]: With dead ends: 4489 [2021-06-05 05:57:41,481 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 05:57:41,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 873.6ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 05:57:41,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2827. [2021-06-05 05:57:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 1.9554140127388535) internal successors, (5526), 2826 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 5526 transitions. [2021-06-05 05:57:41,516 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 5526 transitions. Word has length 43 [2021-06-05 05:57:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:41,516 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 5526 transitions. [2021-06-05 05:57:41,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 5526 transitions. [2021-06-05 05:57:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:41,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:41,518 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:41,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 05:57:41,719 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-06-05 05:57:41,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:41,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227362799] [2021-06-05 05:57:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:42,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227362799] [2021-06-05 05:57:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227362799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:42,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430643318] [2021-06-05 05:57:42,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:42,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:42,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:42,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:42,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:42,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:42,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:42,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:42,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:42,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:42,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430643318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:42,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:42,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 05:57:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121862010] [2021-06-05 05:57:42,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:57:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:42,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:57:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:57:42,701 INFO L87 Difference]: Start difference. First operand 2827 states and 5526 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:43,736 INFO L93 Difference]: Finished difference Result 4129 states and 8090 transitions. [2021-06-05 05:57:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:57:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:43,740 INFO L225 Difference]: With dead ends: 4129 [2021-06-05 05:57:43,740 INFO L226 Difference]: Without dead ends: 3769 [2021-06-05 05:57:43,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1216.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:57:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-06-05 05:57:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3141. [2021-06-05 05:57:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 1.9576433121019108) internal successors, (6147), 3140 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 6147 transitions. [2021-06-05 05:57:43,774 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 6147 transitions. Word has length 43 [2021-06-05 05:57:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:43,774 INFO L482 AbstractCegarLoop]: Abstraction has 3141 states and 6147 transitions. [2021-06-05 05:57:43,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 6147 transitions. [2021-06-05 05:57:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:43,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:43,777 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:43,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:43,977 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-06-05 05:57:43,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:43,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838097363] [2021-06-05 05:57:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:44,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838097363] [2021-06-05 05:57:44,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838097363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:44,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882977702] [2021-06-05 05:57:44,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:44,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:57:44,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:44,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:57:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:44,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:44,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:45,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:45,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:45,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:45,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:45,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:45,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:45,034 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882977702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:45,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:45,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-06-05 05:57:45,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259796001] [2021-06-05 05:57:45,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:57:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:57:45,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:45,035 INFO L87 Difference]: Start difference. First operand 3141 states and 6147 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:45,607 INFO L93 Difference]: Finished difference Result 5700 states and 11356 transitions. [2021-06-05 05:57:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:57:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:45,611 INFO L225 Difference]: With dead ends: 5700 [2021-06-05 05:57:45,611 INFO L226 Difference]: Without dead ends: 5434 [2021-06-05 05:57:45,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-05 05:57:45,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3258. [2021-06-05 05:57:45,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.9610070617132331) internal successors, (6387), 3257 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 6387 transitions. [2021-06-05 05:57:45,642 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 6387 transitions. Word has length 43 [2021-06-05 05:57:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:45,642 INFO L482 AbstractCegarLoop]: Abstraction has 3258 states and 6387 transitions. [2021-06-05 05:57:45,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 6387 transitions. [2021-06-05 05:57:45,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:45,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:45,644 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:45,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 05:57:45,844 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:45,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-06-05 05:57:45,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:45,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839561083] [2021-06-05 05:57:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:46,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:46,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839561083] [2021-06-05 05:57:46,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839561083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:46,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664740965] [2021-06-05 05:57:46,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:46,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:57:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:46,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 05:57:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:46,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:46,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:46,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:46,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:46,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:46,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664740965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:46,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:46,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 05:57:46,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002618355] [2021-06-05 05:57:46,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:57:46,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:46,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:57:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:46,976 INFO L87 Difference]: Start difference. First operand 3258 states and 6387 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:47,250 INFO L93 Difference]: Finished difference Result 4967 states and 9920 transitions. [2021-06-05 05:57:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:57:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:47,255 INFO L225 Difference]: With dead ends: 4967 [2021-06-05 05:57:47,255 INFO L226 Difference]: Without dead ends: 4691 [2021-06-05 05:57:47,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 901.9ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-06-05 05:57:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3321. [2021-06-05 05:57:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 05:57:47,291 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 05:57:47,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:47,291 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 05:57:47,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 05:57:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:47,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:47,293 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:47,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:57:47,494 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-06-05 05:57:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952797479] [2021-06-05 05:57:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:47,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:47,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952797479] [2021-06-05 05:57:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952797479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:47,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432069340] [2021-06-05 05:57:47,880 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 [2021-06-05 05:57:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:47,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:48,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:48,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:48,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:48,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:48,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:48,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:48,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432069340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:48,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:48,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 05:57:48,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654925936] [2021-06-05 05:57:48,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:57:48,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:48,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:57:48,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:48,607 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:49,066 INFO L93 Difference]: Finished difference Result 4281 states and 8456 transitions. [2021-06-05 05:57:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:57:49,066 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:49,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:49,069 INFO L225 Difference]: With dead ends: 4281 [2021-06-05 05:57:49,069 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 05:57:49,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 894.2ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:57:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 05:57:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3321. [2021-06-05 05:57:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 05:57:49,113 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 05:57:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:49,113 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 05:57:49,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 05:57:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:49,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:49,115 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:49,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:49,316 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-06-05 05:57:49,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:49,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020499369] [2021-06-05 05:57:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:49,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:49,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020499369] [2021-06-05 05:57:49,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020499369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:49,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142368810] [2021-06-05 05:57:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:49,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:49,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:49,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:50,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:50,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:50,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:50,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:50,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:50,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:50,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:50,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:50,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142368810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:50,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:50,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 05:57:50,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325236027] [2021-06-05 05:57:50,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:57:50,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:50,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:57:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:50,370 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:50,773 INFO L93 Difference]: Finished difference Result 6029 states and 12136 transitions. [2021-06-05 05:57:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:57:50,773 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:50,778 INFO L225 Difference]: With dead ends: 6029 [2021-06-05 05:57:50,778 INFO L226 Difference]: Without dead ends: 5816 [2021-06-05 05:57:50,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:50,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-06-05 05:57:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 3424. [2021-06-05 05:57:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 1.964943032427695) internal successors, (6726), 3423 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 6726 transitions. [2021-06-05 05:57:50,812 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 6726 transitions. Word has length 43 [2021-06-05 05:57:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:50,812 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 6726 transitions. [2021-06-05 05:57:50,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 6726 transitions. [2021-06-05 05:57:50,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:50,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:50,815 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:51,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:51,029 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-06-05 05:57:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:51,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043035505] [2021-06-05 05:57:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:51,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:51,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043035505] [2021-06-05 05:57:51,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043035505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:51,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360546794] [2021-06-05 05:57:51,467 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 [2021-06-05 05:57:51,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:57:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:51,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:52,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:52,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:52,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:52,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:52,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:52,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:52,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:52,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:52,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:52,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360546794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:52,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:52,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 05:57:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824514725] [2021-06-05 05:57:52,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:57:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:57:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:52,212 INFO L87 Difference]: Start difference. First operand 3424 states and 6726 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:52,963 INFO L93 Difference]: Finished difference Result 5238 states and 10412 transitions. [2021-06-05 05:57:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:57:52,963 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:52,967 INFO L225 Difference]: With dead ends: 5238 [2021-06-05 05:57:52,967 INFO L226 Difference]: Without dead ends: 5180 [2021-06-05 05:57:52,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2021-06-05 05:57:52,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3451. [2021-06-05 05:57:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 05:57:53,003 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 05:57:53,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:53,003 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 05:57:53,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 05:57:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:53,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:53,005 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:53,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:53,205 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-06-05 05:57:53,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:53,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205587380] [2021-06-05 05:57:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:53,539 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:53,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205587380] [2021-06-05 05:57:53,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205587380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:53,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136114843] [2021-06-05 05:57:53,539 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 [2021-06-05 05:57:53,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:53,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:54,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:54,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:54,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:54,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:54,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:54,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:54,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:54,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136114843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:54,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:54,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 05:57:54,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121583710] [2021-06-05 05:57:54,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 05:57:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:54,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 05:57:54,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:54,259 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:54,897 INFO L93 Difference]: Finished difference Result 4745 states and 9374 transitions. [2021-06-05 05:57:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:57:54,897 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:54,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:54,901 INFO L225 Difference]: With dead ends: 4745 [2021-06-05 05:57:54,901 INFO L226 Difference]: Without dead ends: 4730 [2021-06-05 05:57:54,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 838.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:57:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-06-05 05:57:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3451. [2021-06-05 05:57:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:54,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 05:57:54,932 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 05:57:54,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:54,932 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 05:57:54,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 05:57:54,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:54,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:54,934 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:55,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:55,135 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-06-05 05:57:55,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:55,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293380701] [2021-06-05 05:57:55,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:55,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293380701] [2021-06-05 05:57:55,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293380701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517371604] [2021-06-05 05:57:55,434 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 [2021-06-05 05:57:55,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:57:55,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:55,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:55,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:56,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:56,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:56,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:56,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:56,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:56,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:56,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517371604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:56,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:56,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-06-05 05:57:56,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703795162] [2021-06-05 05:57:56,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:57:56,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:56,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:57:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:57:56,074 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:56,605 INFO L93 Difference]: Finished difference Result 5475 states and 10796 transitions. [2021-06-05 05:57:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:57:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:56,610 INFO L225 Difference]: With dead ends: 5475 [2021-06-05 05:57:56,610 INFO L226 Difference]: Without dead ends: 5191 [2021-06-05 05:57:56,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:57:56,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-06-05 05:57:56,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3671. [2021-06-05 05:57:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.9724795640326975) internal successors, (7239), 3670 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7239 transitions. [2021-06-05 05:57:56,659 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7239 transitions. Word has length 43 [2021-06-05 05:57:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:56,659 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7239 transitions. [2021-06-05 05:57:56,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:56,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7239 transitions. [2021-06-05 05:57:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:56,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:56,663 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:56,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 05:57:56,877 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:56,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-06-05 05:57:56,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:56,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873852448] [2021-06-05 05:57:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:57,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873852448] [2021-06-05 05:57:57,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873852448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:57,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371820898] [2021-06-05 05:57:57,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:57,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:57:57,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:57,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:57,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:57,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:57,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:57,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:57,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:57,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:57,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:57,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:57,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371820898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:57,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:57,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 05:57:57,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790336679] [2021-06-05 05:57:57,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:57:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:57:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:57:57,933 INFO L87 Difference]: Start difference. First operand 3671 states and 7239 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:58,228 INFO L93 Difference]: Finished difference Result 5940 states and 12046 transitions. [2021-06-05 05:57:58,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:57:58,228 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:57:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:58,233 INFO L225 Difference]: With dead ends: 5940 [2021-06-05 05:57:58,233 INFO L226 Difference]: Without dead ends: 5733 [2021-06-05 05:57:58,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:57:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-06-05 05:57:58,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 3683. [2021-06-05 05:57:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.9731124388919066) internal successors, (7265), 3682 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 7265 transitions. [2021-06-05 05:57:58,270 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 7265 transitions. Word has length 43 [2021-06-05 05:57:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:58,270 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 7265 transitions. [2021-06-05 05:57:58,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 7265 transitions. [2021-06-05 05:57:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:57:58,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:58,272 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:57:58,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:57:58,474 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-06-05 05:57:58,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:58,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178393754] [2021-06-05 05:57:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:58,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178393754] [2021-06-05 05:57:58,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178393754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:58,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080960273] [2021-06-05 05:57:58,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:58,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:57:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:59,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:59,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:59,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:59,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:57:59,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:59,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:59,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:59,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:57:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:57:59,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080960273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:59,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:59,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 05:57:59,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511192466] [2021-06-05 05:57:59,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 05:57:59,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 05:57:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:57:59,496 INFO L87 Difference]: Start difference. First operand 3683 states and 7265 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:00,035 INFO L93 Difference]: Finished difference Result 4821 states and 9570 transitions. [2021-06-05 05:58:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:58:00,035 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:00,039 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 05:58:00,039 INFO L226 Difference]: Without dead ends: 4806 [2021-06-05 05:58:00,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 797.9ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:58:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-06-05 05:58:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3686. [2021-06-05 05:58:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3685 states have (on average 1.973134328358209) internal successors, (7271), 3685 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:00,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 7271 transitions. [2021-06-05 05:58:00,069 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 7271 transitions. Word has length 43 [2021-06-05 05:58:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:00,069 INFO L482 AbstractCegarLoop]: Abstraction has 3686 states and 7271 transitions. [2021-06-05 05:58:00,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 7271 transitions. [2021-06-05 05:58:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:00,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:00,072 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:00,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 05:58:00,272 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-06-05 05:58:00,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:00,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825844308] [2021-06-05 05:58:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:00,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:00,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825844308] [2021-06-05 05:58:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825844308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:00,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956266277] [2021-06-05 05:58:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:00,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:00,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:00,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:01,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:01,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:01,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:01,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:01,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:01,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:01,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:01,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:01,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956266277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:01,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:01,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-06-05 05:58:01,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796158306] [2021-06-05 05:58:01,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:58:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:58:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:58:01,307 INFO L87 Difference]: Start difference. First operand 3686 states and 7271 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:01,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:01,929 INFO L93 Difference]: Finished difference Result 5294 states and 10543 transitions. [2021-06-05 05:58:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:58:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:01,933 INFO L225 Difference]: With dead ends: 5294 [2021-06-05 05:58:01,933 INFO L226 Difference]: Without dead ends: 5264 [2021-06-05 05:58:01,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:58:01,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2021-06-05 05:58:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 3722. [2021-06-05 05:58:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 1.97420048374093) internal successors, (7346), 3721 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 7346 transitions. [2021-06-05 05:58:01,967 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 7346 transitions. Word has length 43 [2021-06-05 05:58:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:01,967 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 7346 transitions. [2021-06-05 05:58:01,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 7346 transitions. [2021-06-05 05:58:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:01,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:01,969 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:02,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:02,170 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-06-05 05:58:02,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:02,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084824885] [2021-06-05 05:58:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:02,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084824885] [2021-06-05 05:58:02,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084824885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:02,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074219994] [2021-06-05 05:58:02,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:02,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:58:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:02,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:02,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:03,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:03,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:03,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-06-05 05:58:03,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:03,453 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:58:03,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:03,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-06-05 05:58:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:03,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074219994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:03,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:03,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 05:58:03,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453993296] [2021-06-05 05:58:03,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:58:03,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:03,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:58:03,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:58:03,463 INFO L87 Difference]: Start difference. First operand 3722 states and 7346 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:05,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:05,752 INFO L93 Difference]: Finished difference Result 5592 states and 11061 transitions. [2021-06-05 05:58:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:58:05,752 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:05,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:05,756 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 05:58:05,756 INFO L226 Difference]: Without dead ends: 5209 [2021-06-05 05:58:05,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2377.2ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:58:05,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-06-05 05:58:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4162. [2021-06-05 05:58:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 1.9699591444364335) internal successors, (8197), 4161 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 8197 transitions. [2021-06-05 05:58:05,813 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 8197 transitions. Word has length 43 [2021-06-05 05:58:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 8197 transitions. [2021-06-05 05:58:05,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 8197 transitions. [2021-06-05 05:58:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:05,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:05,816 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:06,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 05:58:06,021 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-06-05 05:58:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:06,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219576898] [2021-06-05 05:58:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:06,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:06,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219576898] [2021-06-05 05:58:06,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219576898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:06,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888078370] [2021-06-05 05:58:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:06,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:06,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:06,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:06,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:06,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:06,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:06,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:06,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:06,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:06,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:06,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888078370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:06,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:06,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 05:58:06,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487863714] [2021-06-05 05:58:06,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:58:06,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:06,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:58:06,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:06,872 INFO L87 Difference]: Start difference. First operand 4162 states and 8197 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:08,174 INFO L93 Difference]: Finished difference Result 7069 states and 14124 transitions. [2021-06-05 05:58:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:58:08,174 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:08,179 INFO L225 Difference]: With dead ends: 7069 [2021-06-05 05:58:08,179 INFO L226 Difference]: Without dead ends: 6666 [2021-06-05 05:58:08,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1488.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:58:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-06-05 05:58:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4415. [2021-06-05 05:58:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 1.9725872224739465) internal successors, (8707), 4414 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 8707 transitions. [2021-06-05 05:58:08,223 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 8707 transitions. Word has length 43 [2021-06-05 05:58:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:08,223 INFO L482 AbstractCegarLoop]: Abstraction has 4415 states and 8707 transitions. [2021-06-05 05:58:08,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:08,224 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 8707 transitions. [2021-06-05 05:58:08,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:08,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:08,226 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:08,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:08,427 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-06-05 05:58:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:08,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968402993] [2021-06-05 05:58:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:08,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968402993] [2021-06-05 05:58:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968402993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:08,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052144854] [2021-06-05 05:58:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:08,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:58:08,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:08,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:08,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:09,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-06-05 05:58:09,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:09,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:09,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:09,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-06-05 05:58:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052144854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-06-05 05:58:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909373511] [2021-06-05 05:58:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 05:58:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:09,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 05:58:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:58:09,488 INFO L87 Difference]: Start difference. First operand 4415 states and 8707 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:10,976 INFO L93 Difference]: Finished difference Result 5648 states and 11150 transitions. [2021-06-05 05:58:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:58:10,976 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:10,981 INFO L225 Difference]: With dead ends: 5648 [2021-06-05 05:58:10,981 INFO L226 Difference]: Without dead ends: 5539 [2021-06-05 05:58:10,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1662.6ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:58:10,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-06-05 05:58:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4486. [2021-06-05 05:58:11,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4485 states have (on average 1.9745819397993312) internal successors, (8856), 4485 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8856 transitions. [2021-06-05 05:58:11,017 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8856 transitions. Word has length 43 [2021-06-05 05:58:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:11,017 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 8856 transitions. [2021-06-05 05:58:11,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8856 transitions. [2021-06-05 05:58:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:11,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:11,020 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:11,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 05:58:11,220 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:11,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-06-05 05:58:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:11,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23697050] [2021-06-05 05:58:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:11,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23697050] [2021-06-05 05:58:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23697050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252517620] [2021-06-05 05:58:11,496 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:11,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:58:11,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:11,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:12,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:12,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:12,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:12,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:12,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:12,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:12,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252517620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:12,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:12,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 05:58:12,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418765558] [2021-06-05 05:58:12,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:58:12,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:12,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:58:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:12,065 INFO L87 Difference]: Start difference. First operand 4486 states and 8856 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:12,473 INFO L93 Difference]: Finished difference Result 6505 states and 12851 transitions. [2021-06-05 05:58:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:58:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:12,478 INFO L225 Difference]: With dead ends: 6505 [2021-06-05 05:58:12,478 INFO L226 Difference]: Without dead ends: 6237 [2021-06-05 05:58:12,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 668.9ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-06-05 05:58:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4662. [2021-06-05 05:58:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 1.977043552885647) internal successors, (9215), 4661 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 9215 transitions. [2021-06-05 05:58:12,522 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 9215 transitions. Word has length 43 [2021-06-05 05:58:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:12,522 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 9215 transitions. [2021-06-05 05:58:12,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 9215 transitions. [2021-06-05 05:58:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:12,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:12,526 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:12,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:12,726 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-06-05 05:58:12,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:12,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702578519] [2021-06-05 05:58:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:13,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:13,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702578519] [2021-06-05 05:58:13,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702578519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:13,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584460018] [2021-06-05 05:58:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:13,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:13,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:13,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:13,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:13,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:13,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:13,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:13,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584460018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:13,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:13,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 05:58:13,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918397530] [2021-06-05 05:58:13,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:58:13,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:13,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:58:13,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:13,697 INFO L87 Difference]: Start difference. First operand 4662 states and 9215 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:14,027 INFO L93 Difference]: Finished difference Result 6935 states and 13838 transitions. [2021-06-05 05:58:14,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:58:14,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:14,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:14,033 INFO L225 Difference]: With dead ends: 6935 [2021-06-05 05:58:14,033 INFO L226 Difference]: Without dead ends: 6690 [2021-06-05 05:58:14,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2021-06-05 05:58:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 5133. [2021-06-05 05:58:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5132 states have (on average 1.9912314886983633) internal successors, (10219), 5132 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10219 transitions. [2021-06-05 05:58:14,088 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10219 transitions. Word has length 43 [2021-06-05 05:58:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:14,088 INFO L482 AbstractCegarLoop]: Abstraction has 5133 states and 10219 transitions. [2021-06-05 05:58:14,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10219 transitions. [2021-06-05 05:58:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:14,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:14,092 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:14,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:14,292 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-06-05 05:58:14,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:14,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876662659] [2021-06-05 05:58:14,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:14,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:14,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876662659] [2021-06-05 05:58:14,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876662659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:14,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707144195] [2021-06-05 05:58:14,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:14,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:14,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:14,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:15,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:15,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:15,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:15,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:15,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:15,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707144195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:15,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:15,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 05:58:15,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471731235] [2021-06-05 05:58:15,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:58:15,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:15,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:58:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:15,219 INFO L87 Difference]: Start difference. First operand 5133 states and 10219 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:15,949 INFO L93 Difference]: Finished difference Result 7659 states and 15381 transitions. [2021-06-05 05:58:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:58:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:15,956 INFO L225 Difference]: With dead ends: 7659 [2021-06-05 05:58:15,957 INFO L226 Difference]: Without dead ends: 7594 [2021-06-05 05:58:15,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-06-05 05:58:16,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 4965. [2021-06-05 05:58:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.984488315874295) internal successors, (9851), 4964 states have internal predecessors, (9851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 9851 transitions. [2021-06-05 05:58:16,013 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 9851 transitions. Word has length 43 [2021-06-05 05:58:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:16,013 INFO L482 AbstractCegarLoop]: Abstraction has 4965 states and 9851 transitions. [2021-06-05 05:58:16,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 9851 transitions. [2021-06-05 05:58:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:16,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:16,017 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:16,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 05:58:16,217 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-06-05 05:58:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:16,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627188362] [2021-06-05 05:58:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:16,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:16,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627188362] [2021-06-05 05:58:16,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627188362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:16,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909641396] [2021-06-05 05:58:16,585 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:16,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:58:16,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:16,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:17,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:17,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:17,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:17,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:17,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:17,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:17,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909641396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:17,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:17,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 05:58:17,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693637028] [2021-06-05 05:58:17,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:58:17,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:17,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:58:17,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:58:17,203 INFO L87 Difference]: Start difference. First operand 4965 states and 9851 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:17,602 INFO L93 Difference]: Finished difference Result 6720 states and 13442 transitions. [2021-06-05 05:58:17,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:58:17,602 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:17,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:17,608 INFO L225 Difference]: With dead ends: 6720 [2021-06-05 05:58:17,608 INFO L226 Difference]: Without dead ends: 6615 [2021-06-05 05:58:17,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:58:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2021-06-05 05:58:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 4980. [2021-06-05 05:58:17,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.9847358907411126) internal successors, (9882), 4979 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9882 transitions. [2021-06-05 05:58:17,654 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9882 transitions. Word has length 43 [2021-06-05 05:58:17,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:17,655 INFO L482 AbstractCegarLoop]: Abstraction has 4980 states and 9882 transitions. [2021-06-05 05:58:17,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9882 transitions. [2021-06-05 05:58:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:17,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:17,658 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:17,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 05:58:17,858 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:17,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-06-05 05:58:17,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:17,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241597240] [2021-06-05 05:58:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:18,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241597240] [2021-06-05 05:58:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241597240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563897193] [2021-06-05 05:58:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:18,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:18,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:18,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:18,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:18,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:18,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:18,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:18,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:18,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563897193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:18,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:18,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-06-05 05:58:18,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339104085] [2021-06-05 05:58:18,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:58:18,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:18,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:58:18,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:58:18,696 INFO L87 Difference]: Start difference. First operand 4980 states and 9882 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:18,991 INFO L93 Difference]: Finished difference Result 6288 states and 12461 transitions. [2021-06-05 05:58:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:58:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:18,997 INFO L225 Difference]: With dead ends: 6288 [2021-06-05 05:58:18,997 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 05:58:18,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 660.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:58:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 05:58:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5116. [2021-06-05 05:58:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5115 states have (on average 1.9896383186705768) internal successors, (10177), 5115 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 10177 transitions. [2021-06-05 05:58:19,049 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 10177 transitions. Word has length 43 [2021-06-05 05:58:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:19,049 INFO L482 AbstractCegarLoop]: Abstraction has 5116 states and 10177 transitions. [2021-06-05 05:58:19,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 10177 transitions. [2021-06-05 05:58:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:19,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:19,052 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:19,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:19,253 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:19,253 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-06-05 05:58:19,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:19,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137230582] [2021-06-05 05:58:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:19,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137230582] [2021-06-05 05:58:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137230582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78609474] [2021-06-05 05:58:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:19,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 05:58:19,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:19,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:19,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:20,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:20,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:20,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:20,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:20,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:20,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:20,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:20,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78609474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:20,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:20,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-06-05 05:58:20,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757962973] [2021-06-05 05:58:20,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:58:20,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:58:20,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:20,106 INFO L87 Difference]: Start difference. First operand 5116 states and 10177 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:20,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:20,406 INFO L93 Difference]: Finished difference Result 6874 states and 13706 transitions. [2021-06-05 05:58:20,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:58:20,406 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 43 [2021-06-05 05:58:20,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:20,412 INFO L225 Difference]: With dead ends: 6874 [2021-06-05 05:58:20,412 INFO L226 Difference]: Without dead ends: 6829 [2021-06-05 05:58:20,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 674.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:58:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-06-05 05:58:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5057. [2021-06-05 05:58:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 1.987737341772152) internal successors, (10050), 5056 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 10050 transitions. [2021-06-05 05:58:20,461 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 10050 transitions. Word has length 43 [2021-06-05 05:58:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:20,462 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 10050 transitions. [2021-06-05 05:58:20,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 10050 transitions. [2021-06-05 05:58:20,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:20,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:20,465 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:20,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 05:58:20,665 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:20,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-06-05 05:58:20,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:20,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575697428] [2021-06-05 05:58:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:20,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:20,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575697428] [2021-06-05 05:58:20,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575697428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:20,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458958995] [2021-06-05 05:58:20,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:21,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 05:58:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:21,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 05:58:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:21,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:21,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:21,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:22,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:22,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-06-05 05:58:22,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:22,021 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 05:58:22,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:22,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-06-05 05:58:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:22,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458958995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:22,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:22,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-06-05 05:58:22,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028955200] [2021-06-05 05:58:22,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:58:22,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:58:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:22,033 INFO L87 Difference]: Start difference. First operand 5057 states and 10050 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:24,884 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-05 05:58:27,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:27,255 INFO L93 Difference]: Finished difference Result 7825 states and 15639 transitions. [2021-06-05 05:58:27,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:58:27,255 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:27,262 INFO L225 Difference]: With dead ends: 7825 [2021-06-05 05:58:27,262 INFO L226 Difference]: Without dead ends: 7519 [2021-06-05 05:58:27,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3473.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:58:27,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-06-05 05:58:27,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 5176. [2021-06-05 05:58:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 05:58:27,314 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 05:58:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:27,314 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 05:58:27,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 05:58:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:27,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:27,338 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:27,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:27,539 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:27,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:27,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-06-05 05:58:27,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:27,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833987166] [2021-06-05 05:58:27,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:27,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833987166] [2021-06-05 05:58:27,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833987166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415439749] [2021-06-05 05:58:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:27,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:27,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:28,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:28,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:28,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:28,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:28,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:28,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415439749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:28,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:28,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-06-05 05:58:28,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455933149] [2021-06-05 05:58:28,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:58:28,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:28,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:58:28,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:58:28,541 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:29,006 INFO L93 Difference]: Finished difference Result 6970 states and 13987 transitions. [2021-06-05 05:58:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:58:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:58:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:29,013 INFO L225 Difference]: With dead ends: 6970 [2021-06-05 05:58:29,013 INFO L226 Difference]: Without dead ends: 6925 [2021-06-05 05:58:29,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 774.7ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:58:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-06-05 05:58:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 5176. [2021-06-05 05:58:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 05:58:29,068 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 05:58:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:29,068 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 05:58:29,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 05:58:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:58:29,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:29,072 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:29,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 05:58:29,273 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-06-05 05:58:29,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:29,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53656068] [2021-06-05 05:58:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:29,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53656068] [2021-06-05 05:58:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53656068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051659137] [2021-06-05 05:58:29,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:29,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:29,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:29,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:29,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:30,102 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-06-05 05:58:30,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:30,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:30,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:30,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:30,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-06-05 05:58:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051659137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:30,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:30,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-06-05 05:58:30,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580472269] [2021-06-05 05:58:30,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:58:30,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:58:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:30,119 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:30,499 INFO L93 Difference]: Finished difference Result 6778 states and 13577 transitions. [2021-06-05 05:58:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:58:30,500 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 43 [2021-06-05 05:58:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:30,506 INFO L225 Difference]: With dead ends: 6778 [2021-06-05 05:58:30,506 INFO L226 Difference]: Without dead ends: 6763 [2021-06-05 05:58:30,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 664.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:58:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-06-05 05:58:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5183. [2021-06-05 05:58:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 1.991509069857198) internal successors, (10320), 5182 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 10320 transitions. [2021-06-05 05:58:30,558 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 10320 transitions. Word has length 43 [2021-06-05 05:58:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:30,558 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 10320 transitions. [2021-06-05 05:58:30,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,559 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 10320 transitions. [2021-06-05 05:58:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:58:30,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:30,562 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:30,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:30,765 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:30,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1365327806, now seen corresponding path program 123 times [2021-06-05 05:58:30,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:30,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079634952] [2021-06-05 05:58:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:30,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:30,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079634952] [2021-06-05 05:58:30,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079634952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:30,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327020769] [2021-06-05 05:58:30,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:30,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 05:58:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:58:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:58:30,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327020769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:30,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:30,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 05:58:30,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242716527] [2021-06-05 05:58:30,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:58:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:58:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:58:30,908 INFO L87 Difference]: Start difference. First operand 5183 states and 10320 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:30,947 INFO L93 Difference]: Finished difference Result 5616 states and 11180 transitions. [2021-06-05 05:58:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:58:30,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-06-05 05:58:30,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:30,951 INFO L225 Difference]: With dead ends: 5616 [2021-06-05 05:58:30,951 INFO L226 Difference]: Without dead ends: 5602 [2021-06-05 05:58:30,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:58:30,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-06-05 05:58:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5194. [2021-06-05 05:58:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 1.9924898902368573) internal successors, (10347), 5193 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 10347 transitions. [2021-06-05 05:58:30,994 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 10347 transitions. Word has length 44 [2021-06-05 05:58:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:30,994 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 10347 transitions. [2021-06-05 05:58:30,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,994 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 10347 transitions. [2021-06-05 05:58:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 05:58:30,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:30,998 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:31,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 05:58:31,198 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 124 times [2021-06-05 05:58:31,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:31,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187342756] [2021-06-05 05:58:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:31,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:31,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187342756] [2021-06-05 05:58:31,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187342756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:31,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422374941] [2021-06-05 05:58:31,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:31,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:58:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422374941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:31,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 05:58:31,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778490655] [2021-06-05 05:58:31,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:58:31,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:58:31,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:58:31,370 INFO L87 Difference]: Start difference. First operand 5194 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:31,418 INFO L93 Difference]: Finished difference Result 5677 states and 11327 transitions. [2021-06-05 05:58:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:58:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 44 [2021-06-05 05:58:31,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:31,422 INFO L225 Difference]: With dead ends: 5677 [2021-06-05 05:58:31,423 INFO L226 Difference]: Without dead ends: 5668 [2021-06-05 05:58:31,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:58:31,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-06-05 05:58:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5257. [2021-06-05 05:58:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 1.995433789954338) internal successors, (10488), 5256 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 10488 transitions. [2021-06-05 05:58:31,487 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 10488 transitions. Word has length 44 [2021-06-05 05:58:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:31,487 INFO L482 AbstractCegarLoop]: Abstraction has 5257 states and 10488 transitions. [2021-06-05 05:58:31,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 10488 transitions. [2021-06-05 05:58:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:58:31,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:31,490 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:31,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:58:31,691 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 125 times [2021-06-05 05:58:31,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:31,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331770887] [2021-06-05 05:58:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:32,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:32,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331770887] [2021-06-05 05:58:32,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331770887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:32,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864516998] [2021-06-05 05:58:32,012 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:32,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 05:58:32,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:32,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 05:58:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:32,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-06-05 05:58:32,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:32,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:32,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:32,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 05:58:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864516998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:32,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:32,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-06-05 05:58:32,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403173722] [2021-06-05 05:58:32,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:58:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:58:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:58:32,601 INFO L87 Difference]: Start difference. First operand 5257 states and 10488 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:34,516 INFO L93 Difference]: Finished difference Result 8586 states and 17459 transitions. [2021-06-05 05:58:34,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:58:34,517 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 05:58:34,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:34,523 INFO L225 Difference]: With dead ends: 8586 [2021-06-05 05:58:34,524 INFO L226 Difference]: Without dead ends: 8466 [2021-06-05 05:58:34,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2159.3ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:58:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-06-05 05:58:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5282. [2021-06-05 05:58:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 1.996212838477561) internal successors, (10542), 5281 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 10542 transitions. [2021-06-05 05:58:34,578 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 10542 transitions. Word has length 46 [2021-06-05 05:58:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:34,578 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 10542 transitions. [2021-06-05 05:58:34,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 10542 transitions. [2021-06-05 05:58:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:34,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:34,582 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:34,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:34,782 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:34,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:34,782 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 126 times [2021-06-05 05:58:34,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:34,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57720484] [2021-06-05 05:58:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:35,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:35,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57720484] [2021-06-05 05:58:35,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57720484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:35,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344881498] [2021-06-05 05:58:35,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:35,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 05:58:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:35,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:58:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:36,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:36,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:36,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:36,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:36,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:36,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344881498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:36,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:36,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:36,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709716194] [2021-06-05 05:58:36,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:36,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:36,065 INFO L87 Difference]: Start difference. First operand 5282 states and 10542 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:36,786 INFO L93 Difference]: Finished difference Result 9697 states and 19645 transitions. [2021-06-05 05:58:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:58:36,786 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:36,795 INFO L225 Difference]: With dead ends: 9697 [2021-06-05 05:58:36,796 INFO L226 Difference]: Without dead ends: 9575 [2021-06-05 05:58:36,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1032.5ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:36,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-06-05 05:58:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5303. [2021-06-05 05:58:36,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 5302 states have (on average 1.99622783855149) internal successors, (10584), 5302 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:36,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10584 transitions. [2021-06-05 05:58:36,859 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10584 transitions. Word has length 47 [2021-06-05 05:58:36,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:36,859 INFO L482 AbstractCegarLoop]: Abstraction has 5303 states and 10584 transitions. [2021-06-05 05:58:36,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10584 transitions. [2021-06-05 05:58:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:36,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:36,863 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:37,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:37,064 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 127 times [2021-06-05 05:58:37,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:37,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125277314] [2021-06-05 05:58:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:37,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:37,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125277314] [2021-06-05 05:58:37,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125277314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:37,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586564939] [2021-06-05 05:58:37,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:37,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 05:58:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:38,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-06-05 05:58:38,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:38,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:38,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:38,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 05:58:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586564939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:38,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:38,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142282227] [2021-06-05 05:58:38,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:38,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:38,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:38,337 INFO L87 Difference]: Start difference. First operand 5303 states and 10584 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:38,830 INFO L93 Difference]: Finished difference Result 9274 states and 18836 transitions. [2021-06-05 05:58:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:58:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:38,839 INFO L225 Difference]: With dead ends: 9274 [2021-06-05 05:58:38,839 INFO L226 Difference]: Without dead ends: 9152 [2021-06-05 05:58:38,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1032.8ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-06-05 05:58:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5363. [2021-06-05 05:58:38,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 1.9962700484893696) internal successors, (10704), 5362 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 10704 transitions. [2021-06-05 05:58:38,901 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 10704 transitions. Word has length 47 [2021-06-05 05:58:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:38,901 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 10704 transitions. [2021-06-05 05:58:38,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 10704 transitions. [2021-06-05 05:58:38,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:38,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:38,905 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:39,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:39,105 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 128 times [2021-06-05 05:58:39,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:39,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22275290] [2021-06-05 05:58:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:39,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:39,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22275290] [2021-06-05 05:58:39,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22275290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:39,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131694429] [2021-06-05 05:58:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:39,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:39,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:58:39,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:40,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:40,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:40,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:40,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:40,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:40,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:40,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131694429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:40,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:40,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 05:58:40,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106061732] [2021-06-05 05:58:40,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:58:40,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:58:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:58:40,431 INFO L87 Difference]: Start difference. First operand 5363 states and 10704 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:41,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:41,067 INFO L93 Difference]: Finished difference Result 9393 states and 18931 transitions. [2021-06-05 05:58:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:58:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:41,077 INFO L225 Difference]: With dead ends: 9393 [2021-06-05 05:58:41,077 INFO L226 Difference]: Without dead ends: 9327 [2021-06-05 05:58:41,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:58:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-05 05:58:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 5330. [2021-06-05 05:58:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.9941827735034716) internal successors, (10627), 5329 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10627 transitions. [2021-06-05 05:58:41,143 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10627 transitions. Word has length 47 [2021-06-05 05:58:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:41,144 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10627 transitions. [2021-06-05 05:58:41,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10627 transitions. [2021-06-05 05:58:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:41,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:41,148 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:41,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:41,349 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 129 times [2021-06-05 05:58:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698700937] [2021-06-05 05:58:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:41,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698700937] [2021-06-05 05:58:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698700937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916205735] [2021-06-05 05:58:41,702 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:41,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:58:41,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:41,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 05:58:41,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:42,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:42,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:42,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:42,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:42,814 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 05:58:42,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:42,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-06-05 05:58:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:42,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916205735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:42,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:42,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:42,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827721726] [2021-06-05 05:58:42,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:42,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:42,824 INFO L87 Difference]: Start difference. First operand 5330 states and 10627 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:46,845 INFO L93 Difference]: Finished difference Result 9678 states and 19547 transitions. [2021-06-05 05:58:46,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:58:46,845 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:46,854 INFO L225 Difference]: With dead ends: 9678 [2021-06-05 05:58:46,854 INFO L226 Difference]: Without dead ends: 9218 [2021-06-05 05:58:46,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3464.1ms TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:58:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-05 05:58:46,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 5507. [2021-06-05 05:58:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.995277878677806) internal successors, (10986), 5506 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 10986 transitions. [2021-06-05 05:58:46,925 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 10986 transitions. Word has length 47 [2021-06-05 05:58:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:46,925 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 10986 transitions. [2021-06-05 05:58:46,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 10986 transitions. [2021-06-05 05:58:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:46,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:46,929 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:47,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 05:58:47,130 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:47,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:47,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 130 times [2021-06-05 05:58:47,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:47,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739723085] [2021-06-05 05:58:47,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:47,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:47,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739723085] [2021-06-05 05:58:47,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739723085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:47,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592100792] [2021-06-05 05:58:47,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:47,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:47,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:47,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 05:58:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:48,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:48,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-06-05 05:58:48,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:48,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:48,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:48,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 05:58:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:48,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592100792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:48,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:48,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:48,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498146728] [2021-06-05 05:58:48,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:48,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:48,504 INFO L87 Difference]: Start difference. First operand 5507 states and 10986 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:49,322 INFO L93 Difference]: Finished difference Result 8590 states and 17250 transitions. [2021-06-05 05:58:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:58:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:49,329 INFO L225 Difference]: With dead ends: 8590 [2021-06-05 05:58:49,329 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 05:58:49,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 05:58:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 5513. [2021-06-05 05:58:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 1.9954644412191582) internal successors, (10999), 5512 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 10999 transitions. [2021-06-05 05:58:49,385 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 10999 transitions. Word has length 47 [2021-06-05 05:58:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:49,386 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 10999 transitions. [2021-06-05 05:58:49,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 10999 transitions. [2021-06-05 05:58:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:49,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:49,389 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:49,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:58:49,590 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 131 times [2021-06-05 05:58:49,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:49,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990406980] [2021-06-05 05:58:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:49,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:49,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990406980] [2021-06-05 05:58:49,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990406980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:49,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508442161] [2021-06-05 05:58:49,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:49,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 05:58:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:49,971 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 05:58:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:50,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:50,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:50,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:50,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:50,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:50,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508442161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:50,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:50,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:50,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726423708] [2021-06-05 05:58:50,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:50,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:50,882 INFO L87 Difference]: Start difference. First operand 5513 states and 10999 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:51,842 INFO L93 Difference]: Finished difference Result 11538 states and 23485 transitions. [2021-06-05 05:58:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:58:51,842 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:51,852 INFO L225 Difference]: With dead ends: 11538 [2021-06-05 05:58:51,852 INFO L226 Difference]: Without dead ends: 11355 [2021-06-05 05:58:51,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1050.1ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-06-05 05:58:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 5330. [2021-06-05 05:58:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.99962469506474) internal successors, (10656), 5329 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10656 transitions. [2021-06-05 05:58:51,922 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10656 transitions. Word has length 47 [2021-06-05 05:58:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:51,922 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10656 transitions. [2021-06-05 05:58:51,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10656 transitions. [2021-06-05 05:58:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:51,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:51,925 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:52,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:58:52,126 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 132 times [2021-06-05 05:58:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624482111] [2021-06-05 05:58:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:52,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624482111] [2021-06-05 05:58:52,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624482111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:52,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383019938] [2021-06-05 05:58:52,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:52,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 05:58:52,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:52,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:58:52,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:53,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:53,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:53,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:53,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:53,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:53,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383019938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:53,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:53,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 05:58:53,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773701542] [2021-06-05 05:58:53,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:58:53,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:53,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:58:53,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:58:53,315 INFO L87 Difference]: Start difference. First operand 5330 states and 10656 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:54,219 INFO L93 Difference]: Finished difference Result 6335 states and 12694 transitions. [2021-06-05 05:58:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:58:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:54,225 INFO L225 Difference]: With dead ends: 6335 [2021-06-05 05:58:54,226 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 05:58:54,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1313.3ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:58:54,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 05:58:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4817. [2021-06-05 05:58:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 1.995016611295681) internal successors, (9608), 4816 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 9608 transitions. [2021-06-05 05:58:54,274 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 9608 transitions. Word has length 47 [2021-06-05 05:58:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:54,274 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 9608 transitions. [2021-06-05 05:58:54,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 9608 transitions. [2021-06-05 05:58:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:54,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:54,277 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:54,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:54,478 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:54,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:54,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 133 times [2021-06-05 05:58:54,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:54,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866725911] [2021-06-05 05:58:54,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:54,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866725911] [2021-06-05 05:58:54,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866725911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:54,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804288392] [2021-06-05 05:58:54,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:54,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:58:54,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:55,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:55,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:55,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:55,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:55,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:55,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:55,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804288392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:55,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:55,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 05:58:55,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374561148] [2021-06-05 05:58:55,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:55,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:55,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:55,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:55,774 INFO L87 Difference]: Start difference. First operand 4817 states and 9608 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:56,702 INFO L93 Difference]: Finished difference Result 9532 states and 19425 transitions. [2021-06-05 05:58:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:58:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:56,710 INFO L225 Difference]: With dead ends: 9532 [2021-06-05 05:58:56,711 INFO L226 Difference]: Without dead ends: 9364 [2021-06-05 05:58:56,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-06-05 05:58:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 4844. [2021-06-05 05:58:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4843 states have (on average 1.993392525294239) internal successors, (9654), 4843 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 9654 transitions. [2021-06-05 05:58:56,765 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 9654 transitions. Word has length 47 [2021-06-05 05:58:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:56,765 INFO L482 AbstractCegarLoop]: Abstraction has 4844 states and 9654 transitions. [2021-06-05 05:58:56,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 9654 transitions. [2021-06-05 05:58:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:56,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:56,769 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:56,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:58:56,969 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 134 times [2021-06-05 05:58:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:56,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700775846] [2021-06-05 05:58:56,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:57,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700775846] [2021-06-05 05:58:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700775846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953181718] [2021-06-05 05:58:57,265 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:57,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:57,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 05:58:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:58,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:58,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-06-05 05:58:58,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:58,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:58,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:58,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 05:58:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:58,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953181718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:58,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:58,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 05:58:58,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299384976] [2021-06-05 05:58:58,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 05:58:58,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 05:58:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:58:58,188 INFO L87 Difference]: Start difference. First operand 4844 states and 9654 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:59,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:59,416 INFO L93 Difference]: Finished difference Result 6513 states and 13009 transitions. [2021-06-05 05:58:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:58:59,416 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 05:58:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:59,421 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 05:58:59,421 INFO L226 Difference]: Without dead ends: 6115 [2021-06-05 05:58:59,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1439.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2021-06-05 05:58:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 4875. [2021-06-05 05:58:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.9883052933935166) internal successors, (9691), 4874 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 9691 transitions. [2021-06-05 05:58:59,464 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 9691 transitions. Word has length 47 [2021-06-05 05:58:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:59,464 INFO L482 AbstractCegarLoop]: Abstraction has 4875 states and 9691 transitions. [2021-06-05 05:58:59,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 9691 transitions. [2021-06-05 05:58:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 05:58:59,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:59,467 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:58:59,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:59,668 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:59,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 135 times [2021-06-05 05:58:59,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:59,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125792222] [2021-06-05 05:58:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:59,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:59,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125792222] [2021-06-05 05:58:59,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125792222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:59,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419791386] [2021-06-05 05:58:59,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:00,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 05:59:00,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:00,045 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 05:59:00,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:46,643 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 06:00:46,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:46,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:46,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 60 [2021-06-05 06:00:46,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:46,742 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.1 percent of original size [2021-06-05 06:00:46,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:00:46,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:181, output treesize:7 [2021-06-05 06:00:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 134 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:00:46,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419791386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:46,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:46,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 06:00:46,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455486389] [2021-06-05 06:00:46,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 06:00:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 06:00:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1122, Unknown=27, NotChecked=0, Total=1260 [2021-06-05 06:00:46,753 INFO L87 Difference]: Start difference. First operand 4875 states and 9691 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:58,486 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-05 06:01:58,200 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 Received shutdown request... [2021-06-05 06:02:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:02:37,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:02:37,923 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:02:37,925 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:02:37,926 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:02:37,927 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:02:37 BasicIcfg [2021-06-05 06:02:37,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:02:37,927 INFO L168 Benchmark]: Toolchain (without parser) took 855414.27 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 321.0 MB in the beginning and 755.6 MB in the end (delta: -434.6 MB). Peak memory consumption was 86.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 341.8 MB. Free memory is still 322.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.18 ms. Allocated memory is still 341.8 MB. Free memory was 320.9 MB in the beginning and 319.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 INFO L168 Benchmark]: Boogie Preprocessor took 16.18 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.5 MB in the end (delta: 882.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 INFO L168 Benchmark]: RCFGBuilder took 303.56 ms. Allocated memory is still 341.8 MB. Free memory was 318.5 MB in the beginning and 306.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 INFO L168 Benchmark]: TraceAbstraction took 855054.96 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 306.0 MB in the beginning and 755.6 MB in the end (delta: -449.6 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:02:37,927 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 0.20 ms. Allocated memory is still 341.8 MB. Free memory is still 322.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.18 ms. Allocated memory is still 341.8 MB. Free memory was 320.9 MB in the beginning and 319.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.18 ms. Allocated memory is still 341.8 MB. Free memory was 319.4 MB in the beginning and 318.5 MB in the end (delta: 882.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 303.56 ms. Allocated memory is still 341.8 MB. Free memory was 318.5 MB in the beginning and 306.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 855054.96 ms. Allocated memory was 341.8 MB in the beginning and 859.8 MB in the end (delta: 518.0 MB). Free memory was 306.0 MB in the beginning and 755.6 MB in the end (delta: -449.6 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4875states) and FLOYD_HOARE automaton (currently 24 states, 36 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 40 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (4875states) and FLOYD_HOARE automaton (currently 24 states, 36 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 40 known predicates. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (4875states) and FLOYD_HOARE automaton (currently 24 states, 36 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 40 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854968.0ms, OverallIterations: 141, TraceHistogramMax: 9, EmptinessCheckTime: 244.5ms, AutomataDifference: 577364.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10658 SDtfs, 17924 SDslu, 148770 SDs, 0 SdLazy, 84348 SolverSat, 3046 SolverUnsat, 107 SolverUnknown, 0 SolverNotchecked, 385872.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7624 GetRequests, 3538 SyntacticMatches, 447 SemanticMatches, 3638 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26320 ImplicationChecksByTransitivity, 383531.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5513occurred in iteration=136, InterpolantAutomatonStates: 3288, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2992.8ms AutomataMinimizationTime, 140 MinimizatonAttempts, 144837 StatesRemovedByMinimization, 138 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 514.2ms SsaConstructionTime, 2367.0ms SatisfiabilityAnalysisTime, 240054.8ms InterpolantComputationTime, 10260 NumberOfCodeBlocks, 10260 NumberOfCodeBlocksAsserted, 685 NumberOfCheckSat, 9982 ConstructedInterpolants, 618 QuantifiedInterpolants, 331422 SizeOfPredicates, 155 NumberOfNonLiveVariables, 13049 ConjunctsInSsa, 7098 ConjunctsInUnsatCore, 278 InterpolantComputations, 4 PerfectInterpolantSequences, 585/22237 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