/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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:10:06,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:10:06,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:10:06,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:10:06,633 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 23:10:06,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:10:06,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:10:06,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:10:06,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:10:06,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:10:06,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:10:06,653 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:10:06,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:10:06,653 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:10:06,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:10:06,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:10:06,654 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:10:06,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:10:06,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:10:06,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:10:06,655 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:10:06,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:10:06,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:10:06,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:10:06,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:10:06,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:10:06,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:10:07,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:10:07,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:10:07,033 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:10:07,036 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:10:07,037 INFO L432 ainManager$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 23:10:07,037 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 23:10:07,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:10:07,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:10:07,071 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:10:07,071 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:10:07,071 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:10:07,082 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,090 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:10:07,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:10:07,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:10:07,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:10:07,107 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,107 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,108 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,108 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,111 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,114 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,114 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 11:10:07" (1/1) ... [2021-06-05 23:10:07,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:10:07,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:10:07,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:10:07,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:10:07,119 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 11:10:07" (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 23:10:07,194 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:10:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:10:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:10:07,195 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:10:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:10:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:10:07,196 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:10:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:10:07,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:10:07,197 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 23:10:07,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:10:07,416 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 23:10:07,417 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 23:10:07,418 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:10:07 BoogieIcfgContainer [2021-06-05 23:10:07,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:10:07,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:10:07,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:10:07,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:10:07,422 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 11:10:07" (1/2) ... [2021-06-05 23:10:07,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f4ced6b and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:10:07, skipping insertion in model container [2021-06-05 23:10:07,423 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 11:10:07" (2/2) ... [2021-06-05 23:10:07,424 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-06-05 23:10:07,429 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:10:07,433 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:10:07,433 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:10:07,434 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:10:07,512 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:10:07,546 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:10:07,561 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:10:07,561 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:10:07,561 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:10:07,562 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:10:07,562 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:10:07,562 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:10:07,562 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:10:07,562 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:10:07,598 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-06-05 23:10:07,608 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 23:10:07,610 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 23:10:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 23:10:07,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:07,616 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:07,616 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-06-05 23:10:07,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018351730] [2021-06-05 23:10:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:07,780 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 23:10:07,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018351730] [2021-06-05 23:10:07,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018351730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:10:07,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:10:07,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:10:07,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87644615] [2021-06-05 23:10:07,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:10:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:10:07,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:07,803 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 23:10:07,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:07,826 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-06-05 23:10:07,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:10:07,828 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 23:10:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:07,835 INFO L225 Difference]: With dead ends: 42 [2021-06-05 23:10:07,835 INFO L226 Difference]: Without dead ends: 30 [2021-06-05 23:10:07,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-06-05 23:10:07,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-06-05 23:10:07,860 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 23:10:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-06-05 23:10:07,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-06-05 23:10:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:07,863 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-06-05 23:10:07,863 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 23:10:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-06-05 23:10:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 23:10:07,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:07,864 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:07,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:10:07,865 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:07,865 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-06-05 23:10:07,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:07,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177851240] [2021-06-05 23:10:07,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:07,888 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 23:10:07,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:07,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177851240] [2021-06-05 23:10:07,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177851240] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:10:07,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:10:07,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:10:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094306378] [2021-06-05 23:10:07,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:10:07,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:10:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:07,891 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 23:10:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:07,899 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-06-05 23:10:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:10:07,900 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 23:10:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:07,900 INFO L225 Difference]: With dead ends: 32 [2021-06-05 23:10:07,900 INFO L226 Difference]: Without dead ends: 31 [2021-06-05 23:10:07,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-06-05 23:10:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-06-05 23:10:07,905 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 23:10:07,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-06-05 23:10:07,906 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-06-05 23:10:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:07,906 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-06-05 23:10:07,907 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 23:10:07,907 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-06-05 23:10:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:10:07,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:07,907 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:07,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:10:07,908 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:07,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-06-05 23:10:07,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:07,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044075839] [2021-06-05 23:10:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:07,983 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 23:10:07,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:07,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044075839] [2021-06-05 23:10:07,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044075839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:07,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111113809] [2021-06-05 23:10:07,984 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 23:10:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:08,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:10:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:08,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 23:10:08,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:08,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:08,238 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 23:10:08,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-06-05 23:10:08,268 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 23:10:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111113809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:08,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:08,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 23:10:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054769020] [2021-06-05 23:10:08,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:10:08,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:10:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:10:08,270 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 23:10:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:08,305 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-05 23:10:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:10:08,305 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 23:10:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:08,306 INFO L225 Difference]: With dead ends: 52 [2021-06-05 23:10:08,306 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 23:10:08,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:10:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 23:10:08,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-06-05 23:10:08,310 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 23:10:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-05 23:10:08,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-06-05 23:10:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:08,311 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-05 23:10:08,312 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 23:10:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-05 23:10:08,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:10:08,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:08,312 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:08,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:10:08,529 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:08,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-06-05 23:10:08,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:08,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727188528] [2021-06-05 23:10:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:08,564 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 23:10:08,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:08,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727188528] [2021-06-05 23:10:08,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727188528] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:10:08,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:10:08,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:10:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275392572] [2021-06-05 23:10:08,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:10:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:10:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:08,566 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 23:10:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:08,573 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-06-05 23:10:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:10:08,573 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 23:10:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:08,574 INFO L225 Difference]: With dead ends: 40 [2021-06-05 23:10:08,574 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 23:10:08,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:10:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 23:10:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-06-05 23:10:08,578 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 23:10:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-06-05 23:10:08,579 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-06-05 23:10:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:08,579 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-06-05 23:10:08,579 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 23:10:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-06-05 23:10:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:10:08,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:08,580 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:08,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:10:08,580 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:08,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-06-05 23:10:08,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:08,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107460025] [2021-06-05 23:10:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:08,615 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 23:10:08,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:08,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107460025] [2021-06-05 23:10:08,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107460025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:10:08,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:10:08,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:10:08,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737376448] [2021-06-05 23:10:08,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:10:08,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:08,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:10:08,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:10:08,617 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 23:10:08,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:08,644 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-06-05 23:10:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:10:08,648 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 23:10:08,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:08,649 INFO L225 Difference]: With dead ends: 86 [2021-06-05 23:10:08,649 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 23:10:08,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:10:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 23:10:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-06-05 23:10:08,656 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 23:10:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 23:10:08,657 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-06-05 23:10:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:08,657 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 23:10:08,657 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 23:10:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 23:10:08,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:10:08,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:08,658 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:08,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:10:08,659 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-06-05 23:10:08,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:08,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103573226] [2021-06-05 23:10:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:08,690 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 23:10:08,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:08,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103573226] [2021-06-05 23:10:08,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103573226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942778134] [2021-06-05 23:10:08,691 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 23:10:08,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:10:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 23:10:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:08,779 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 23:10:08,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942778134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:08,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:08,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 23:10:08,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184731787] [2021-06-05 23:10:08,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:10:08,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:08,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:10:08,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:10:08,781 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 23:10:08,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:08,804 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-06-05 23:10:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:10:08,805 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 23:10:08,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:08,806 INFO L225 Difference]: With dead ends: 79 [2021-06-05 23:10:08,806 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 23:10:08,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:10:08,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 23:10:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-06-05 23:10:08,813 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 23:10:08,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 23:10:08,814 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-06-05 23:10:08,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:08,814 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 23:10:08,815 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 23:10:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 23:10:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:10:08,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:08,815 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:09,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:09,039 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-06-05 23:10:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:09,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546670009] [2021-06-05 23:10:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:09,225 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 23:10:09,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:09,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546670009] [2021-06-05 23:10:09,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546670009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:09,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456160772] [2021-06-05 23:10:09,226 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 23:10:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:10:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:09,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:09,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:09,483 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 23:10:09,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:09,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:09,504 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 23:10:09,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-06-05 23:10:09,522 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 23:10:09,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456160772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:09,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:09,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:10:09,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781403052] [2021-06-05 23:10:09,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:10:09,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:10:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:10:09,526 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 23:10:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:09,590 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-06-05 23:10:09,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:10:09,590 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 23:10:09,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:09,597 INFO L225 Difference]: With dead ends: 106 [2021-06-05 23:10:09,597 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 23:10:09,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:10:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 23:10:09,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-06-05 23:10:09,612 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 23:10:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-06-05 23:10:09,613 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-06-05 23:10:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-06-05 23:10:09,613 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 23:10:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-06-05 23:10:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:10:09,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:09,614 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:09,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:09,815 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:09,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-06-05 23:10:09,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:09,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698460333] [2021-06-05 23:10:09,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:09,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:09,927 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 23:10:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698460333] [2021-06-05 23:10:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698460333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271112728] [2021-06-05 23:10:09,928 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 23:10:09,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:09,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:10:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:10,078 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:10:10,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23:10:10,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:10,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:10,087 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 23:10:10,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-06-05 23:10:10,100 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 23:10:10,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271112728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:10,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:10,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 23:10:10,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386009456] [2021-06-05 23:10:10,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:10:10,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:10:10,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:10:10,102 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 23:10:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:10,162 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-06-05 23:10:10,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:10:10,166 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 23:10:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:10,167 INFO L225 Difference]: With dead ends: 111 [2021-06-05 23:10:10,167 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 23:10:10,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:10:10,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 23:10:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-06-05 23:10:10,183 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 23:10:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-06-05 23:10:10,184 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-06-05 23:10:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:10,184 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-06-05 23:10:10,184 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 23:10:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-06-05 23:10:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:10:10,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:10,189 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:10,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:10,401 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-06-05 23:10:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:10,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531425682] [2021-06-05 23:10:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:10,440 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 23:10:10,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:10,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531425682] [2021-06-05 23:10:10,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531425682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:10,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348583858] [2021-06-05 23:10:10,442 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 23:10:10,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:10:10,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:10,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:10:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:10,531 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 23:10:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348583858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:10,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:10,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:10:10,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277027848] [2021-06-05 23:10:10,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:10:10,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:10,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:10:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:10:10,537 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 23:10:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:10,557 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-06-05 23:10:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:10:10,558 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 23:10:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:10,559 INFO L225 Difference]: With dead ends: 178 [2021-06-05 23:10:10,559 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 23:10:10,559 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:10:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 23:10:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-06-05 23:10:10,578 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 23:10:10,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-06-05 23:10:10,579 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-06-05 23:10:10,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:10,579 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-06-05 23:10:10,579 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 23:10:10,579 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-06-05 23:10:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:10:10,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:10,580 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:10,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:10,801 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-06-05 23:10:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:10,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731764731] [2021-06-05 23:10:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:11,007 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 23:10:11,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731764731] [2021-06-05 23:10:11,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731764731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:11,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233652602] [2021-06-05 23:10:11,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:10:11,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:11,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:11,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:10:11,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:11,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:11,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:11,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:11,259 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 23:10:11,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:11,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:11,269 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 23:10:11,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:10:11,280 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 23:10:11,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233652602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:11,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:11,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:10:11,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551440912] [2021-06-05 23:10:11,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:10:11,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:11,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:10:11,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:10:11,283 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 23:10:11,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:11,419 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-06-05 23:10:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:10:11,420 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 23:10:11,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:11,422 INFO L225 Difference]: With dead ends: 229 [2021-06-05 23:10:11,422 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 23:10:11,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:10:11,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 23:10:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-06-05 23:10:11,429 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 23:10:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-06-05 23:10:11,434 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-06-05 23:10:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:11,434 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-06-05 23:10:11,435 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 23:10:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-06-05 23:10:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:10:11,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:11,440 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:11,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:11,653 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-06-05 23:10:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:11,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017058725] [2021-06-05 23:10:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:11,840 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 23:10:11,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017058725] [2021-06-05 23:10:11,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017058725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:11,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584545551] [2021-06-05 23:10:11,841 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 23:10:11,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:10:11,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:10:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,066 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 23:10:12,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:12,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:12,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:12,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:10:12,088 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 23:10:12,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584545551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:12,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:12,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 23:10:12,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971747825] [2021-06-05 23:10:12,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:10:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:10:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:10:12,091 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 23:10:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:12,177 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 23:10:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:10:12,177 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 23:10:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:12,178 INFO L225 Difference]: With dead ends: 242 [2021-06-05 23:10:12,178 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 23:10:12,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:10:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 23:10:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-06-05 23:10:12,183 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 23:10:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-06-05 23:10:12,184 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-06-05 23:10:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:12,184 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-06-05 23:10:12,184 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 23:10:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-06-05 23:10:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:10:12,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:12,185 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:12,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:12,401 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-06-05 23:10:12,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:12,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885287407] [2021-06-05 23:10:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:12,560 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 23:10:12,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:12,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885287407] [2021-06-05 23:10:12,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885287407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:12,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874452799] [2021-06-05 23:10:12,561 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 23:10:12,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:10:12,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:10:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:12,747 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 23:10:12,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:12,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:12,756 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 23:10:12,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:10:12,768 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 23:10:12,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874452799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:12,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:12,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 23:10:12,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491179710] [2021-06-05 23:10:12,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:10:12,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:12,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:10:12,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:10:12,770 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 23:10:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:12,946 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-06-05 23:10:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:10:12,947 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 23:10:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:12,949 INFO L225 Difference]: With dead ends: 370 [2021-06-05 23:10:12,949 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 23:10:12,950 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 23:10:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-06-05 23:10:12,955 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 23:10:12,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-06-05 23:10:12,956 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-06-05 23:10:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:12,956 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-06-05 23:10:12,956 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 23:10:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-06-05 23:10:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:10:12,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:12,958 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:13,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 23:10:13,177 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:13,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-06-05 23:10:13,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:13,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897262056] [2021-06-05 23:10:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:13,316 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 23:10:13,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:13,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897262056] [2021-06-05 23:10:13,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897262056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:13,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056646197] [2021-06-05 23:10:13,317 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 23:10:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:13,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:10:13,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:13,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:13,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:13,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:13,492 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 23:10:13,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:13,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:13,501 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 23:10:13,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 23:10:13,515 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 23:10:13,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056646197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:13,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:13,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 23:10:13,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362728816] [2021-06-05 23:10:13,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:10:13,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:13,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:10:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:10:13,519 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 23:10:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:13,634 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-06-05 23:10:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:13,634 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 23:10:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:13,636 INFO L225 Difference]: With dead ends: 296 [2021-06-05 23:10:13,636 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 23:10:13,636 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:10:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 23:10:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-06-05 23:10:13,640 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 23:10:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-06-05 23:10:13,640 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-06-05 23:10:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:13,640 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-06-05 23:10:13,641 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 23:10:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-06-05 23:10:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:10:13,641 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:13,641 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:13,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:13,857 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-06-05 23:10:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:13,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855227323] [2021-06-05 23:10:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:13,974 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 23:10:13,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855227323] [2021-06-05 23:10:13,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855227323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:13,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999464777] [2021-06-05 23:10:13,974 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 23:10:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:10:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:14,117 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:10:14,118 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 23:10:14,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:14,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:14,123 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 23:10:14,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-06-05 23:10:14,134 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 23:10:14,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999464777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:14,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:14,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 23:10:14,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152005369] [2021-06-05 23:10:14,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:10:14,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:14,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:10:14,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:10:14,135 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 23:10:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:14,230 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-06-05 23:10:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:10:14,230 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 23:10:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:14,231 INFO L225 Difference]: With dead ends: 174 [2021-06-05 23:10:14,231 INFO L226 Difference]: Without dead ends: 159 [2021-06-05 23:10:14,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:10:14,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-06-05 23:10:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-06-05 23:10:14,234 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 23:10:14,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-06-05 23:10:14,235 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-06-05 23:10:14,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:14,235 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-06-05 23:10:14,235 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 23:10:14,235 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-06-05 23:10:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:10:14,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:14,236 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:14,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:14,456 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:14,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-06-05 23:10:14,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:14,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170842254] [2021-06-05 23:10:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:14,505 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 23:10:14,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170842254] [2021-06-05 23:10:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170842254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372194765] [2021-06-05 23:10:14,505 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 23:10:14,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:10:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:10:14,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:14,595 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 23:10:14,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372194765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:14,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:14,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:10:14,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717562800] [2021-06-05 23:10:14,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:10:14,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:10:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:10:14,596 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 23:10:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:14,620 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-06-05 23:10:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:10:14,620 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 23:10:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:14,621 INFO L225 Difference]: With dead ends: 258 [2021-06-05 23:10:14,621 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 23:10:14,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:10:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 23:10:14,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-06-05 23:10:14,625 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 23:10:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-06-05 23:10:14,626 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-06-05 23:10:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:14,626 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-06-05 23:10:14,626 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 23:10:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-06-05 23:10:14,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:14,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:14,627 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:14,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:10:14,841 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-06-05 23:10:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888151876] [2021-06-05 23:10:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:15,012 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 23:10:15,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888151876] [2021-06-05 23:10:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888151876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:15,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524669932] [2021-06-05 23:10:15,012 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 23:10:15,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:15,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:15,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:15,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:15,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:15,271 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 23:10:15,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:15,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:15,280 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 23:10:15,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:15,293 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 23:10:15,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524669932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:15,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:15,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 23:10:15,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004954778] [2021-06-05 23:10:15,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:10:15,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:15,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:10:15,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:10:15,295 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 23:10:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:15,535 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-06-05 23:10:15,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:10:15,536 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 23:10:15,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:15,537 INFO L225 Difference]: With dead ends: 412 [2021-06-05 23:10:15,537 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 23:10:15,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 23:10:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-06-05 23:10:15,542 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 23:10:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-06-05 23:10:15,542 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-06-05 23:10:15,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:15,543 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-06-05 23:10:15,543 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 23:10:15,543 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-06-05 23:10:15,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:15,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:15,543 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:15,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:10:15,744 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:15,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:15,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-06-05 23:10:15,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:15,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002071614] [2021-06-05 23:10:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:15,897 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 23:10:15,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:15,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002071614] [2021-06-05 23:10:15,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002071614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:15,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751555884] [2021-06-05 23:10:15,897 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 23:10:15,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:10:15,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:15,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:15,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:16,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:16,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:16,188 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 23:10:16,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:16,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:16,197 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 23:10:16,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:16,207 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 23:10:16,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751555884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:16,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:16,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 23:10:16,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159718509] [2021-06-05 23:10:16,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:10:16,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:16,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:10:16,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:10:16,209 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 23:10:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:16,339 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-06-05 23:10:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:16,340 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 23:10:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:16,341 INFO L225 Difference]: With dead ends: 449 [2021-06-05 23:10:16,341 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 23:10:16,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:10:16,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 23:10:16,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-06-05 23:10:16,348 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 23:10:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 23:10:16,348 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 23:10:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:16,348 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 23:10:16,349 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 23:10:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 23:10:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:16,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:16,350 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:16,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:10:16,573 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:16,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:16,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-06-05 23:10:16,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738624668] [2021-06-05 23:10:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:16,747 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 23:10:16,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738624668] [2021-06-05 23:10:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738624668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753615548] [2021-06-05 23:10:16,748 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 23:10:16,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:10:16,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:16,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:17,034 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 23:10:17,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:17,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:17,044 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 23:10:17,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:17,055 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 23:10:17,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753615548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:17,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:17,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:10:17,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662464963] [2021-06-05 23:10:17,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:10:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:17,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:10:17,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:10:17,060 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 23:10:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:17,212 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-06-05 23:10:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:17,213 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 23:10:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:17,214 INFO L225 Difference]: With dead ends: 418 [2021-06-05 23:10:17,214 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 23:10:17,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:10:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 23:10:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-06-05 23:10:17,219 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 23:10:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-06-05 23:10:17,220 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-06-05 23:10:17,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:17,220 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-06-05 23:10:17,220 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 23:10:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-06-05 23:10:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:17,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:17,222 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:17,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:17,423 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-06-05 23:10:17,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:17,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729371384] [2021-06-05 23:10:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:17,598 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 23:10:17,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:17,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729371384] [2021-06-05 23:10:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729371384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:17,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36179000] [2021-06-05 23:10:17,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:10:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:17,835 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 23:10:17,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:17,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:17,849 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 23:10:17,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:17,859 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 23:10:17,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36179000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:17,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:17,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 23:10:17,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063561978] [2021-06-05 23:10:17,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:10:17,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:10:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:17,861 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 23:10:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:18,169 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-06-05 23:10:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:18,169 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 23:10:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:18,171 INFO L225 Difference]: With dead ends: 607 [2021-06-05 23:10:18,171 INFO L226 Difference]: Without dead ends: 443 [2021-06-05 23:10:18,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-05 23:10:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-06-05 23:10:18,177 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 23:10:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-06-05 23:10:18,178 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-06-05 23:10:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:18,178 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-06-05 23:10:18,178 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 23:10:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-06-05 23:10:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:18,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:18,179 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:18,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:18,401 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-06-05 23:10:18,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:18,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521572871] [2021-06-05 23:10:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:18,564 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 23:10:18,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:18,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521572871] [2021-06-05 23:10:18,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521572871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:18,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748903067] [2021-06-05 23:10:18,565 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 23:10:18,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:18,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:18,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:18,808 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 23:10:18,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:18,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:18,816 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 23:10:18,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:18,835 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 23:10:18,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748903067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:18,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:18,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 23:10:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109880639] [2021-06-05 23:10:18,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:10:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:18,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:10:18,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:10:18,837 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 23:10:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:19,027 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-06-05 23:10:19,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:19,028 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 23:10:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:19,030 INFO L225 Difference]: With dead ends: 566 [2021-06-05 23:10:19,030 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 23:10:19,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:10:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 23:10:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-06-05 23:10:19,036 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 23:10:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-06-05 23:10:19,037 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-06-05 23:10:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:19,038 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-06-05 23:10:19,038 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 23:10:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-06-05 23:10:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:19,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:19,038 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:19,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:19,239 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:19,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-06-05 23:10:19,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:19,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856787888] [2021-06-05 23:10:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:19,409 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 23:10:19,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:19,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856787888] [2021-06-05 23:10:19,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856787888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:19,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913385710] [2021-06-05 23:10:19,410 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 23:10:19,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:10:19,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:19,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:19,748 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 23:10:19,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:19,769 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 23:10:19,770 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 23:10:19,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-06-05 23:10:19,781 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 23:10:19,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913385710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:19,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:19,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 23:10:19,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979420401] [2021-06-05 23:10:19,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:10:19,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:10:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:19,784 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 23:10:20,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:20,395 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-06-05 23:10:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:20,395 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 23:10:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:20,397 INFO L225 Difference]: With dead ends: 619 [2021-06-05 23:10:20,397 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 23:10:20,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 529.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 23:10:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-06-05 23:10:20,405 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 23:10:20,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 23:10:20,406 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 23:10:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:20,406 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 23:10:20,406 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 23:10:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 23:10:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:20,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:20,407 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:20,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:10:20,607 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:20,608 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-06-05 23:10:20,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:20,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399811946] [2021-06-05 23:10:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:20,760 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 23:10:20,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:20,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399811946] [2021-06-05 23:10:20,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399811946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:20,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550324278] [2021-06-05 23:10:20,760 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 23:10:20,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 23:10:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:20,998 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 23:10:20,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:21,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:21,005 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 23:10:21,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:21,014 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 23:10:21,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550324278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:21,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 23:10:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194433795] [2021-06-05 23:10:21,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:10:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:10:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:21,015 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 23:10:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:21,231 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-06-05 23:10:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:10:21,231 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 23:10:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:21,233 INFO L225 Difference]: With dead ends: 631 [2021-06-05 23:10:21,233 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 23:10:21,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 23:10:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-06-05 23:10:21,241 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 23:10:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-06-05 23:10:21,242 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-06-05 23:10:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:21,242 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-06-05 23:10:21,242 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 23:10:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-06-05 23:10:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:10:21,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:21,243 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:21,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:10:21,443 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-06-05 23:10:21,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:21,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852735019] [2021-06-05 23:10:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:21,598 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 23:10:21,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852735019] [2021-06-05 23:10:21,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852735019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379386304] [2021-06-05 23:10:21,598 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 23:10:21,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:10:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:21,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:10:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:21,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:21,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:21,861 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 23:10:21,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:21,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:21,870 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 23:10:21,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-06-05 23:10:21,880 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 23:10:21,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379386304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:21,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:21,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 23:10:21,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234178906] [2021-06-05 23:10:21,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:10:21,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:21,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:10:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:21,882 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 23:10:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:22,095 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-06-05 23:10:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:10:22,096 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 23:10:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:22,098 INFO L225 Difference]: With dead ends: 654 [2021-06-05 23:10:22,098 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 23:10:22,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:10:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 23:10:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-06-05 23:10:22,105 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 23:10:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-06-05 23:10:22,106 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-06-05 23:10:22,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:22,106 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-06-05 23:10:22,106 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 23:10:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-06-05 23:10:22,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:22,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:22,107 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:22,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:10:22,321 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:22,321 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-06-05 23:10:22,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:22,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105552722] [2021-06-05 23:10:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:22,517 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 23:10:22,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:22,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105552722] [2021-06-05 23:10:22,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105552722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:22,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512466173] [2021-06-05 23:10:22,518 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 23:10:22,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:10:22,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:22,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:22,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:22,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:22,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:22,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:22,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:22,873 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 23:10:22,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:22,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:22,883 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 23:10:22,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:22,894 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 23:10:22,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512466173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:22,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:22,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 23:10:22,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754388665] [2021-06-05 23:10:22,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:10:22,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:22,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:10:22,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:22,898 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 23:10:23,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:23,109 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-06-05 23:10:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:23,109 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 23:10:23,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:23,113 INFO L225 Difference]: With dead ends: 666 [2021-06-05 23:10:23,113 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 23:10:23,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 23:10:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-06-05 23:10:23,121 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 23:10:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-06-05 23:10:23,122 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-06-05 23:10:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:23,122 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-06-05 23:10:23,122 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 23:10:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-06-05 23:10:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:23,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:23,123 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:23,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:10:23,344 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:23,345 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-06-05 23:10:23,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:23,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28245275] [2021-06-05 23:10:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:23,508 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 23:10:23,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28245275] [2021-06-05 23:10:23,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28245275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:23,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842107663] [2021-06-05 23:10:23,508 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 23:10:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:23,575 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:23,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:23,919 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 23:10:23,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:23,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:23,929 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 23:10:23,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:23,940 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 23:10:23,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842107663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:23,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:23,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-05 23:10:23,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242077562] [2021-06-05 23:10:23,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:10:23,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:23,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:10:23,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:10:23,941 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 23:10:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:24,198 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-06-05 23:10:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:24,198 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 23:10:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:24,200 INFO L225 Difference]: With dead ends: 559 [2021-06-05 23:10:24,200 INFO L226 Difference]: Without dead ends: 532 [2021-06-05 23:10:24,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:10:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-05 23:10:24,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-06-05 23:10:24,208 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 23:10:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-06-05 23:10:24,209 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-06-05 23:10:24,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:24,209 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-06-05 23:10:24,210 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 23:10:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-06-05 23:10:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:24,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:24,210 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:10:24,425 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-06-05 23:10:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:24,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611990068] [2021-06-05 23:10:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:24,583 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 23:10:24,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:24,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611990068] [2021-06-05 23:10:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611990068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:24,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305723055] [2021-06-05 23:10:24,584 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 23:10:24,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:24,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:24,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:24,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:24,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:24,927 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 23:10:24,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:24,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:24,937 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 23:10:24,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:24,947 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 23:10:24,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305723055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:24,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:24,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 23:10:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775300188] [2021-06-05 23:10:24,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:10:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:24,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:10:24,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:24,949 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 23:10:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:25,217 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-06-05 23:10:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:25,217 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 23:10:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:25,220 INFO L225 Difference]: With dead ends: 724 [2021-06-05 23:10:25,220 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 23:10:25,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 23:10:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-06-05 23:10:25,226 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 23:10:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-06-05 23:10:25,227 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-06-05 23:10:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:25,227 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-06-05 23:10:25,227 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 23:10:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-06-05 23:10:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:25,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:25,228 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:25,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:25,428 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-06-05 23:10:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:25,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385360082] [2021-06-05 23:10:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:25,632 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 23:10:25,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385360082] [2021-06-05 23:10:25,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385360082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:25,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141449563] [2021-06-05 23:10:25,632 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 23:10:25,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:10:25,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:25,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:25,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:25,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:25,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:25,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:25,967 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 23:10:25,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:25,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:25,976 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 23:10:25,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:25,988 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 23:10:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141449563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:25,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:25,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 23:10:25,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986987239] [2021-06-05 23:10:25,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:10:25,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:10:25,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:25,989 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 23:10:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:26,237 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-06-05 23:10:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:26,237 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 23:10:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:26,238 INFO L225 Difference]: With dead ends: 700 [2021-06-05 23:10:26,238 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 23:10:26,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:10:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 23:10:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-06-05 23:10:26,244 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 23:10:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-06-05 23:10:26,245 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-06-05 23:10:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:26,245 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-06-05 23:10:26,246 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 23:10:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-06-05 23:10:26,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:26,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:26,246 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:26,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:10:26,469 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-06-05 23:10:26,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:26,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400240426] [2021-06-05 23:10:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:26,654 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 23:10:26,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:26,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400240426] [2021-06-05 23:10:26,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400240426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:26,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386817808] [2021-06-05 23:10:26,655 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 23:10:26,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:26,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:26,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:27,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:27,020 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 23:10:27,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:27,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:27,031 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 23:10:27,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:27,042 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 23:10:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386817808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 23:10:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969971285] [2021-06-05 23:10:27,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:10:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:10:27,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:10:27,043 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 23:10:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:27,386 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-06-05 23:10:27,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:27,386 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 23:10:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:27,388 INFO L225 Difference]: With dead ends: 672 [2021-06-05 23:10:27,388 INFO L226 Difference]: Without dead ends: 617 [2021-06-05 23:10:27,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 383.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:10:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-05 23:10:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-06-05 23:10:27,394 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 23:10:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-05 23:10:27,395 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-06-05 23:10:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:27,395 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-05 23:10:27,395 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 23:10:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-05 23:10:27,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:27,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:27,396 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:27,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:27,619 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-06-05 23:10:27,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:27,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092120785] [2021-06-05 23:10:27,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:27,836 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 23:10:27,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092120785] [2021-06-05 23:10:27,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092120785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:27,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330704223] [2021-06-05 23:10:27,837 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 23:10:27,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:10:27,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:27,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 23:10:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:28,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:28,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:28,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:28,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:28,254 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 23:10:28,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:28,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:28,262 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 23:10:28,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-06-05 23:10:28,282 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 23:10:28,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330704223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:28,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:28,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:10:28,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580933630] [2021-06-05 23:10:28,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:10:28,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:10:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:28,283 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 23:10:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:29,169 INFO L93 Difference]: Finished difference Result 703 states and 1400 transitions. [2021-06-05 23:10:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:10:29,170 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 23:10:29,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:29,172 INFO L225 Difference]: With dead ends: 703 [2021-06-05 23:10:29,172 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 23:10:29,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:10:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 23:10:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-06-05 23:10:29,177 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 23:10:29,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-06-05 23:10:29,178 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-06-05 23:10:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:29,178 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-06-05 23:10:29,178 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 23:10:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-06-05 23:10:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:29,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:29,179 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:29,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:10:29,401 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-06-05 23:10:29,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:29,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872119068] [2021-06-05 23:10:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:29,615 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 23:10:29,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872119068] [2021-06-05 23:10:29,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872119068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:29,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797869291] [2021-06-05 23:10:29,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:10:29,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:10:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:29,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:29,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:29,968 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 23:10:29,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:29,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:29,980 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 23:10:29,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:29,990 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 23:10:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797869291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:29,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:29,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 23:10:29,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777096376] [2021-06-05 23:10:29,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:10:29,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:29,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:10:29,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:10:29,992 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 23:10:30,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:30,241 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-06-05 23:10:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:10:30,241 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 23:10:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:30,246 INFO L225 Difference]: With dead ends: 636 [2021-06-05 23:10:30,246 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 23:10:30,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:10:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 23:10:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-06-05 23:10:30,251 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 23:10:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-06-05 23:10:30,252 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-06-05 23:10:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:30,252 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-06-05 23:10:30,252 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 23:10:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-06-05 23:10:30,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:30,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:30,253 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:30,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:30,477 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-06-05 23:10:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:30,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184145338] [2021-06-05 23:10:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:30,666 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 23:10:30,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184145338] [2021-06-05 23:10:30,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184145338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:30,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496303766] [2021-06-05 23:10:30,666 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 23:10:30,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:30,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:30,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:30,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:30,947 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 23:10:30,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:30,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:30,956 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 23:10:30,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:30,964 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 23:10:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496303766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:30,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:30,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 23:10:30,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040299309] [2021-06-05 23:10:30,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:10:30,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:10:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:30,965 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 23:10:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:31,368 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-06-05 23:10:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:10:31,369 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 23:10:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:31,370 INFO L225 Difference]: With dead ends: 779 [2021-06-05 23:10:31,370 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 23:10:31,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:10:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 23:10:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-06-05 23:10:31,375 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 23:10:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-06-05 23:10:31,376 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-06-05 23:10:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:31,376 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-06-05 23:10:31,377 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 23:10:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-06-05 23:10:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:31,377 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:31,377 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:31,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:10:31,593 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-06-05 23:10:31,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:31,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434838644] [2021-06-05 23:10:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:31,779 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 23:10:31,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434838644] [2021-06-05 23:10:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434838644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387821418] [2021-06-05 23:10:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:10:31,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:31,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:31,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:31,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:32,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:32,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:32,084 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 23:10:32,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:32,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:32,091 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 23:10:32,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:32,105 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 23:10:32,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387821418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:32,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:32,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-06-05 23:10:32,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959188368] [2021-06-05 23:10:32,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:10:32,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:32,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:10:32,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:32,107 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 23:10:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:32,443 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-06-05 23:10:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:10:32,444 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 23:10:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:32,445 INFO L225 Difference]: With dead ends: 731 [2021-06-05 23:10:32,445 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 23:10:32,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:10:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 23:10:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-06-05 23:10:32,450 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 23:10:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-06-05 23:10:32,450 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-06-05 23:10:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:32,451 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-06-05 23:10:32,451 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 23:10:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-06-05 23:10:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:32,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:32,451 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:32,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:32,665 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:32,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:32,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-06-05 23:10:32,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:32,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886400233] [2021-06-05 23:10:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:32,845 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 23:10:32,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886400233] [2021-06-05 23:10:32,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886400233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300755494] [2021-06-05 23:10:32,845 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 23:10:32,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:10:32,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:32,871 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:10:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:33,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:33,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:33,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:33,190 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 23:10:33,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:33,210 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:10:33,212 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 23:10:33,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-06-05 23:10:33,222 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 23:10:33,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300755494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:33,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:33,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 23:10:33,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507944491] [2021-06-05 23:10:33,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:10:33,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:33,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:10:33,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:10:33,223 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 23:10:34,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:34,086 INFO L93 Difference]: Finished difference Result 858 states and 1666 transitions. [2021-06-05 23:10:34,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:10:34,086 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 23:10:34,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:34,088 INFO L225 Difference]: With dead ends: 858 [2021-06-05 23:10:34,088 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 23:10:34,088 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:10:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 23:10:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-06-05 23:10:34,094 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 23:10:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-06-05 23:10:34,094 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-06-05 23:10:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-06-05 23:10:34,095 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 23:10:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-06-05 23:10:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:34,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:34,096 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:10:34,309 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-06-05 23:10:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576895513] [2021-06-05 23:10:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:34,497 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 23:10:34,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:34,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576895513] [2021-06-05 23:10:34,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576895513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:34,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567977418] [2021-06-05 23:10:34,497 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 23:10:34,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:34,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:34,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:34,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:34,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:34,782 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 23:10:34,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:34,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:34,792 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 23:10:34,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:34,802 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 23:10:34,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567977418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:34,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:34,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 23:10:34,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942184433] [2021-06-05 23:10:34,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:10:34,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:34,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:10:34,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:10:34,804 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 23:10:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:35,211 INFO L93 Difference]: Finished difference Result 821 states and 1585 transitions. [2021-06-05 23:10:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:10:35,211 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 23:10:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:35,213 INFO L225 Difference]: With dead ends: 821 [2021-06-05 23:10:35,213 INFO L226 Difference]: Without dead ends: 610 [2021-06-05 23:10:35,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 520.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:10:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-05 23:10:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-06-05 23:10:35,220 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 23:10:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-06-05 23:10:35,221 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-06-05 23:10:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:35,221 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-06-05 23:10:35,221 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 23:10:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-06-05 23:10:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:35,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:35,222 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:35,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:35,437 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-06-05 23:10:35,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:35,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229659888] [2021-06-05 23:10:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:35,606 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 23:10:35,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:35,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229659888] [2021-06-05 23:10:35,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229659888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:35,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503000386] [2021-06-05 23:10:35,606 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 23:10:35,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:10:35,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:35,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:35,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:35,876 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 23:10:35,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:35,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:35,897 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 23:10:35,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:35,907 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 23:10:35,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503000386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:35,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:35,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-06-05 23:10:35,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490877388] [2021-06-05 23:10:35,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:10:35,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:35,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:10:35,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:10:35,909 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 23:10:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:36,141 INFO L93 Difference]: Finished difference Result 762 states and 1488 transitions. [2021-06-05 23:10:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:36,141 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 23:10:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:36,143 INFO L225 Difference]: With dead ends: 762 [2021-06-05 23:10:36,143 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 23:10:36,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 309.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 23:10:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-06-05 23:10:36,153 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 23:10:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-06-05 23:10:36,153 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-06-05 23:10:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:36,154 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-06-05 23:10:36,154 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 23:10:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-06-05 23:10:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:36,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:36,155 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:36,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:10:36,377 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-06-05 23:10:36,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:36,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869921061] [2021-06-05 23:10:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:36,566 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 23:10:36,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:36,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869921061] [2021-06-05 23:10:36,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869921061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:36,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880111481] [2021-06-05 23:10:36,567 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 23:10:36,598 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:10:36,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:36,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:36,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:36,834 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 23:10:36,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:36,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:36,841 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 23:10:36,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-06-05 23:10:36,849 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 23:10:36,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880111481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:36,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:36,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-05 23:10:36,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541123904] [2021-06-05 23:10:36,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:10:36,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:36,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:10:36,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:36,850 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 23:10:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:37,045 INFO L93 Difference]: Finished difference Result 745 states and 1468 transitions. [2021-06-05 23:10:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:37,045 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 23:10:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:37,047 INFO L225 Difference]: With dead ends: 745 [2021-06-05 23:10:37,047 INFO L226 Difference]: Without dead ends: 700 [2021-06-05 23:10:37,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:10:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-06-05 23:10:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-06-05 23:10:37,053 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 23:10:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-06-05 23:10:37,054 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-06-05 23:10:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:37,054 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-06-05 23:10:37,054 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 23:10:37,054 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-06-05 23:10:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:10:37,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:37,055 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:37,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:10:37,269 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-06-05 23:10:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:37,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109461608] [2021-06-05 23:10:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:37,440 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 23:10:37,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109461608] [2021-06-05 23:10:37,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109461608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:37,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577949478] [2021-06-05 23:10:37,440 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 23:10:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:37,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:10:37,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:37,658 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-05 23:10:37,658 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 23:10:37,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:37,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:37,662 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 23:10:37,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-06-05 23:10:37,671 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 23:10:37,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577949478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:37,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:37,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-05 23:10:37,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909993603] [2021-06-05 23:10:37,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:10:37,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:37,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:10:37,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:10:37,672 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 23:10:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:37,846 INFO L93 Difference]: Finished difference Result 609 states and 1180 transitions. [2021-06-05 23:10:37,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:10:37,846 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 23:10:37,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:37,848 INFO L225 Difference]: With dead ends: 609 [2021-06-05 23:10:37,848 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 23:10:37,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:10:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 23:10:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-06-05 23:10:37,852 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 23:10:37,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-06-05 23:10:37,853 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-06-05 23:10:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:37,853 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-06-05 23:10:37,853 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 23:10:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-06-05 23:10:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:10:37,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:37,854 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:38,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:10:38,072 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:38,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-06-05 23:10:38,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:38,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650827815] [2021-06-05 23:10:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:38,109 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 23:10:38,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650827815] [2021-06-05 23:10:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650827815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269692616] [2021-06-05 23:10:38,109 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 23:10:38,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:38,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:38,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:10:38,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:38,191 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 23:10:38,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269692616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:38,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:38,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 23:10:38,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536037523] [2021-06-05 23:10:38,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:10:38,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:38,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:10:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:10:38,192 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 23:10:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:38,213 INFO L93 Difference]: Finished difference Result 646 states and 1247 transitions. [2021-06-05 23:10:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:10:38,214 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 23:10:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:38,216 INFO L225 Difference]: With dead ends: 646 [2021-06-05 23:10:38,216 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 23:10:38,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:10:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 23:10:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-06-05 23:10:38,223 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 23:10:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-06-05 23:10:38,224 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-06-05 23:10:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:38,224 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-06-05 23:10:38,224 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 23:10:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-06-05 23:10:38,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:10:38,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:38,225 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:38,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:10:38,441 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:38,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:38,441 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-06-05 23:10:38,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:38,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704048213] [2021-06-05 23:10:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:38,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:38,494 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 23:10:38,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704048213] [2021-06-05 23:10:38,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704048213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:38,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328424715] [2021-06-05 23:10:38,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:10:38,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:10:38,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:10:38,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:38,576 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 23:10:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328424715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:38,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:38,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 23:10:38,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787134111] [2021-06-05 23:10:38,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:10:38,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:38,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:10:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:10:38,577 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 23:10:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:38,609 INFO L93 Difference]: Finished difference Result 817 states and 1634 transitions. [2021-06-05 23:10:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:10:38,609 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 23:10:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:38,612 INFO L225 Difference]: With dead ends: 817 [2021-06-05 23:10:38,612 INFO L226 Difference]: Without dead ends: 811 [2021-06-05 23:10:38,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:10:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-06-05 23:10:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-06-05 23:10:38,620 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 23:10:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-06-05 23:10:38,622 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-06-05 23:10:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:38,622 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-06-05 23:10:38,622 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 23:10:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-06-05 23:10:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:38,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:38,623 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:38,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:10:38,846 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:38,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-06-05 23:10:38,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:38,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825379281] [2021-06-05 23:10:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:39,060 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 23:10:39,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:39,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825379281] [2021-06-05 23:10:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825379281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:39,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688207581] [2021-06-05 23:10:39,061 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 23:10:39,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:39,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:39,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:39,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:39,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:39,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:39,521 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 23:10:39,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:39,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:39,530 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 23:10:39,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:39,540 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 23:10:39,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688207581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:39,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:39,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 23:10:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962010155] [2021-06-05 23:10:39,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:10:39,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:39,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:10:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:39,541 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 23:10:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:39,851 INFO L93 Difference]: Finished difference Result 1500 states and 3118 transitions. [2021-06-05 23:10:39,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:10:39,851 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 23:10:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:39,856 INFO L225 Difference]: With dead ends: 1500 [2021-06-05 23:10:39,856 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 23:10:39,857 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 23:10:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-06-05 23:10:39,866 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 23:10:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-06-05 23:10:39,867 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-06-05 23:10:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:39,867 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-06-05 23:10:39,867 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 23:10:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-06-05 23:10:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:39,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:39,869 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:40,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:10:40,091 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-06-05 23:10:40,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:40,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348138144] [2021-06-05 23:10:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:40,357 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 23:10:40,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348138144] [2021-06-05 23:10:40,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348138144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154603867] [2021-06-05 23:10:40,358 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 23:10:40,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:10:40,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:40,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:40,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:40,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:40,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:40,851 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 23:10:40,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:40,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:40,861 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 23:10:40,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:40,871 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 23:10:40,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154603867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:40,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:40,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 23:10:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494574898] [2021-06-05 23:10:40,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:10:40,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:10:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:40,872 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 23:10:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:41,205 INFO L93 Difference]: Finished difference Result 1498 states and 3132 transitions. [2021-06-05 23:10:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:10:41,205 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 23:10:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:41,208 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 23:10:41,208 INFO L226 Difference]: Without dead ends: 1403 [2021-06-05 23:10:41,209 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-06-05 23:10:41,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-06-05 23:10:41,216 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 23:10:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-06-05 23:10:41,216 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-06-05 23:10:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:41,216 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-06-05 23:10:41,217 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 23:10:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-06-05 23:10:41,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:41,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:41,217 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:41,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 23:10:41,418 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:41,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:41,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-06-05 23:10:41,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:41,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616712627] [2021-06-05 23:10:41,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:41,622 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 23:10:41,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:41,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616712627] [2021-06-05 23:10:41,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616712627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:41,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631000731] [2021-06-05 23:10:41,623 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 23:10:41,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:10:41,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:41,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:41,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:42,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:42,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:42,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:42,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:42,089 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 23:10:42,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:42,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:42,098 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 23:10:42,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:42,106 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 23:10:42,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631000731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:42,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:42,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-06-05 23:10:42,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767098520] [2021-06-05 23:10:42,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:10:42,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:42,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:10:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:10:42,107 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 23:10:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:42,285 INFO L93 Difference]: Finished difference Result 1268 states and 2646 transitions. [2021-06-05 23:10:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:42,286 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 23:10:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:42,288 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 23:10:42,288 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 23:10:42,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:10:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 23:10:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-06-05 23:10:42,296 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 23:10:42,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 23:10:42,297 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 23:10:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:42,297 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 23:10:42,297 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 23:10:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 23:10:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:42,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:42,298 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:42,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:42,521 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-06-05 23:10:42,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:42,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419438994] [2021-06-05 23:10:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:42,795 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 23:10:42,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:42,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419438994] [2021-06-05 23:10:42,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419438994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:42,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201139184] [2021-06-05 23:10:42,796 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 23:10:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:42,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:42,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:43,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:43,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:43,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:43,270 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 23:10:43,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:43,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:43,277 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 23:10:43,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:43,286 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 23:10:43,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201139184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:43,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:43,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 23:10:43,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244949476] [2021-06-05 23:10:43,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:10:43,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:10:43,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:43,287 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 23:10:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:43,642 INFO L93 Difference]: Finished difference Result 1258 states and 2602 transitions. [2021-06-05 23:10:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:10:43,642 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 23:10:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:43,646 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 23:10:43,646 INFO L226 Difference]: Without dead ends: 1204 [2021-06-05 23:10:43,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 563.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-06-05 23:10:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-06-05 23:10:43,655 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 23:10:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-06-05 23:10:43,656 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-06-05 23:10:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:43,656 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-06-05 23:10:43,656 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 23:10:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-06-05 23:10:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:43,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:43,657 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:43,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:43,873 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:43,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-06-05 23:10:43,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:43,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309526706] [2021-06-05 23:10:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:44,099 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 23:10:44,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:44,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309526706] [2021-06-05 23:10:44,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309526706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:44,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63530215] [2021-06-05 23:10:44,100 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 23:10:44,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:44,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:44,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:44,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:44,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:44,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:44,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:44,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:44,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:44,592 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 23:10:44,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:44,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:44,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:10:44,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:44,625 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 23:10:44,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63530215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:44,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:44,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-06-05 23:10:44,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784392365] [2021-06-05 23:10:44,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:10:44,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:10:44,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:44,626 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 23:10:44,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:44,921 INFO L93 Difference]: Finished difference Result 934 states and 1907 transitions. [2021-06-05 23:10:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:10:44,921 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 23:10:44,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:44,924 INFO L225 Difference]: With dead ends: 934 [2021-06-05 23:10:44,924 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 23:10:44,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:10:44,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 23:10:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-06-05 23:10:44,932 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 23:10:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-06-05 23:10:44,933 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-06-05 23:10:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:44,933 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-06-05 23:10:44,933 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 23:10:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-06-05 23:10:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:44,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:44,934 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:45,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:45,157 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:45,158 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-06-05 23:10:45,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:45,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466421148] [2021-06-05 23:10:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:45,402 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 23:10:45,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466421148] [2021-06-05 23:10:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466421148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324946625] [2021-06-05 23:10:45,402 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 23:10:45,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:10:45,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:45,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:46,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:46,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:46,462 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 23:10:46,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:46,478 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-06-05 23:10:46,479 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 23:10:46,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-06-05 23:10:46,488 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 23:10:46,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324946625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:46,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:46,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 23:10:46,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085470510] [2021-06-05 23:10:46,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:10:46,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:46,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:10:46,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:10:46,489 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 23:10:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:52,081 INFO L93 Difference]: Finished difference Result 1198 states and 2387 transitions. [2021-06-05 23:10:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:10:52,081 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 23:10:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:52,083 INFO L225 Difference]: With dead ends: 1198 [2021-06-05 23:10:52,083 INFO L226 Difference]: Without dead ends: 976 [2021-06-05 23:10:52,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2483.2ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:10:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-06-05 23:10:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-06-05 23:10:52,090 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 23:10:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-06-05 23:10:52,091 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-06-05 23:10:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:52,091 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-06-05 23:10:52,091 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 23:10:52,091 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-06-05 23:10:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:52,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:52,092 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:52,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:10:52,294 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-06-05 23:10:52,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:52,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11882626] [2021-06-05 23:10:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:52,528 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 23:10:52,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11882626] [2021-06-05 23:10:52,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11882626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:52,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859276797] [2021-06-05 23:10:52,529 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 23:10:52,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:10:52,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:52,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:52,954 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 23:10:52,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:52,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:52,962 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 23:10:52,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:52,970 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 23:10:52,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859276797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:52,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:52,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-05 23:10:52,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110402507] [2021-06-05 23:10:52,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:10:52,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:10:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:52,971 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 23:10:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:53,219 INFO L93 Difference]: Finished difference Result 1761 states and 3634 transitions. [2021-06-05 23:10:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:10:53,219 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 23:10:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:53,221 INFO L225 Difference]: With dead ends: 1761 [2021-06-05 23:10:53,221 INFO L226 Difference]: Without dead ends: 1632 [2021-06-05 23:10:53,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-06-05 23:10:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-06-05 23:10:53,230 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 23:10:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-06-05 23:10:53,231 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-06-05 23:10:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:53,231 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-06-05 23:10:53,231 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 23:10:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-06-05 23:10:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:53,232 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:53,232 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:53,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:53,437 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:53,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:53,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-06-05 23:10:53,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:53,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423690172] [2021-06-05 23:10:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:53,688 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 23:10:53,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423690172] [2021-06-05 23:10:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423690172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136056483] [2021-06-05 23:10:53,688 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 23:10:53,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:10:53,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:53,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:10:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:54,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:54,229 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 23:10:54,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:54,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:54,235 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 23:10:54,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-06-05 23:10:54,255 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 23:10:54,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136056483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:54,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:54,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:10:54,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103235628] [2021-06-05 23:10:54,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:10:54,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:10:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:10:54,256 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 23:10:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:55,282 INFO L93 Difference]: Finished difference Result 1434 states and 2903 transitions. [2021-06-05 23:10:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:10:55,283 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 23:10:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:55,285 INFO L225 Difference]: With dead ends: 1434 [2021-06-05 23:10:55,285 INFO L226 Difference]: Without dead ends: 1212 [2021-06-05 23:10:55,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1143.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:10:55,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-06-05 23:10:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-06-05 23:10:55,297 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 23:10:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-06-05 23:10:55,298 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-06-05 23:10:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:55,298 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-06-05 23:10:55,298 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 23:10:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-06-05 23:10:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:55,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:55,300 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:55,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:10:55,513 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:55,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:55,513 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-06-05 23:10:55,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:55,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307509992] [2021-06-05 23:10:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:55,729 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 23:10:55,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307509992] [2021-06-05 23:10:55,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307509992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:55,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607118202] [2021-06-05 23:10:55,729 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 23:10:55,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:10:55,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:55,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:55,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:56,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:56,128 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 23:10:56,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:56,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:56,135 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 23:10:56,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:56,143 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 23:10:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607118202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:56,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:56,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 23:10:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476249120] [2021-06-05 23:10:56,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:10:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:10:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:10:56,144 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 23:10:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:56,470 INFO L93 Difference]: Finished difference Result 1504 states and 3031 transitions. [2021-06-05 23:10:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:10:56,470 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 23:10:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:56,472 INFO L225 Difference]: With dead ends: 1504 [2021-06-05 23:10:56,472 INFO L226 Difference]: Without dead ends: 1463 [2021-06-05 23:10:56,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:10:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-06-05 23:10:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-06-05 23:10:56,483 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 23:10:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-06-05 23:10:56,484 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-06-05 23:10:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:56,485 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-06-05 23:10:56,485 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 23:10:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-06-05 23:10:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:56,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:56,486 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:56,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:10:56,705 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-06-05 23:10:56,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:56,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355887940] [2021-06-05 23:10:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:57,005 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 23:10:57,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355887940] [2021-06-05 23:10:57,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355887940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:57,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719529041] [2021-06-05 23:10:57,005 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 23:10:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:57,037 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:57,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:57,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:57,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:57,460 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 23:10:57,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:57,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:57,470 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 23:10:57,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:57,481 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 23:10:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719529041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-05 23:10:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780729082] [2021-06-05 23:10:57,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:10:57,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:10:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:10:57,483 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 23:10:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:58,060 INFO L93 Difference]: Finished difference Result 1685 states and 3364 transitions. [2021-06-05 23:10:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:10:58,060 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 23:10:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:58,062 INFO L225 Difference]: With dead ends: 1685 [2021-06-05 23:10:58,062 INFO L226 Difference]: Without dead ends: 1455 [2021-06-05 23:10:58,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 792.6ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:10:58,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-06-05 23:10:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-06-05 23:10:58,071 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 23:10:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-06-05 23:10:58,072 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-06-05 23:10:58,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:58,072 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-06-05 23:10:58,072 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 23:10:58,072 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-06-05 23:10:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:58,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:58,076 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:58,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:10:58,298 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:58,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:58,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-06-05 23:10:58,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:58,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759484284] [2021-06-05 23:10:58,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:58,462 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 23:10:58,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759484284] [2021-06-05 23:10:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759484284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:58,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056926199] [2021-06-05 23:10:58,462 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 23:10:58,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:10:58,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:58,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:10:58,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:10:58,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:10:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:10:58,796 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 23:10:58,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:10:58,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:10:58,803 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 23:10:58,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:10:58,811 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 23:10:58,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056926199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:58,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:10:58,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-06-05 23:10:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683282031] [2021-06-05 23:10:58,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:10:58,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:10:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:10:58,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:10:58,812 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 23:10:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:10:59,254 INFO L93 Difference]: Finished difference Result 1889 states and 3808 transitions. [2021-06-05 23:10:59,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:10:59,254 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 23:10:59,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:10:59,256 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 23:10:59,256 INFO L226 Difference]: Without dead ends: 1691 [2021-06-05 23:10:59,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 589.6ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:10:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-06-05 23:10:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-06-05 23:10:59,271 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 23:10:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-06-05 23:10:59,273 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-06-05 23:10:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:10:59,273 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-06-05 23:10:59,273 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 23:10:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-06-05 23:10:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:10:59,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:10:59,274 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:10:59,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:10:59,484 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:10:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:10:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-06-05 23:10:59,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:10:59,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338517521] [2021-06-05 23:10:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:10:59,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:10:59,739 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 23:10:59,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:10:59,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338517521] [2021-06-05 23:10:59,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338517521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:10:59,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142777271] [2021-06-05 23:10:59,739 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 23:10:59,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:10:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:10:59,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:10:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:00,242 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 23:11:00,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:00,262 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:11:00,263 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 23:11:00,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-06-05 23:11:00,274 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 23:11:00,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142777271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:00,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:00,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-05 23:11:00,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419451570] [2021-06-05 23:11:00,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:11:00,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:00,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:11:00,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:11:00,275 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 23:11:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:01,174 INFO L93 Difference]: Finished difference Result 2019 states and 3995 transitions. [2021-06-05 23:11:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:11:01,174 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 23:11:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:01,176 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 23:11:01,176 INFO L226 Difference]: Without dead ends: 1805 [2021-06-05 23:11:01,177 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:11:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-06-05 23:11:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-06-05 23:11:01,187 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 23:11:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-06-05 23:11:01,188 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-06-05 23:11:01,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:01,188 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-06-05 23:11:01,188 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 23:11:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-06-05 23:11:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:01,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:01,189 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:01,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:01,390 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-06-05 23:11:01,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:01,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374730880] [2021-06-05 23:11:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:01,610 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 23:11:01,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:01,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374730880] [2021-06-05 23:11:01,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374730880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:01,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920834155] [2021-06-05 23:11:01,610 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 23:11:01,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:01,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:01,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:11:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:01,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:01,952 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 23:11:01,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:01,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:01,959 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 23:11:01,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:11:01,967 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 23:11:01,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920834155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:01,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:01,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-05 23:11:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146644084] [2021-06-05 23:11:01,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:11:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:11:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:11:01,968 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 23:11:02,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:02,295 INFO L93 Difference]: Finished difference Result 2038 states and 4167 transitions. [2021-06-05 23:11:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:11:02,295 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 23:11:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:02,297 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 23:11:02,298 INFO L226 Difference]: Without dead ends: 1919 [2021-06-05 23:11:02,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:11:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-06-05 23:11:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-06-05 23:11:02,316 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 23:11:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-06-05 23:11:02,318 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-06-05 23:11:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:02,318 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-06-05 23:11:02,318 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 23:11:02,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-06-05 23:11:02,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:02,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:02,320 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:02,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:02,533 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-06-05 23:11:02,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:02,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820532985] [2021-06-05 23:11:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:02,756 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 23:11:02,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820532985] [2021-06-05 23:11:02,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820532985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:02,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139038631] [2021-06-05 23:11:02,757 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 23:11:02,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:11:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:02,802 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:11:02,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:03,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:03,291 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 23:11:03,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:03,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:03,300 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 23:11:03,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-06-05 23:11:03,318 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 23:11:03,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139038631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:03,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:03,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-06-05 23:11:03,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165663031] [2021-06-05 23:11:03,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:11:03,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:03,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:11:03,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:11:03,319 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 23:11:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:03,958 INFO L93 Difference]: Finished difference Result 1927 states and 3858 transitions. [2021-06-05 23:11:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:11:03,958 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 23:11:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:03,961 INFO L225 Difference]: With dead ends: 1927 [2021-06-05 23:11:03,961 INFO L226 Difference]: Without dead ends: 1781 [2021-06-05 23:11:03,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:11:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-06-05 23:11:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-06-05 23:11:03,978 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 23:11:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-06-05 23:11:03,980 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-06-05 23:11:03,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:03,980 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-06-05 23:11:03,980 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 23:11:03,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-06-05 23:11:03,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:03,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:03,981 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:04,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 23:11:04,196 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-06-05 23:11:04,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:04,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399709720] [2021-06-05 23:11:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:04,420 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 23:11:04,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:04,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399709720] [2021-06-05 23:11:04,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399709720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:04,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414533348] [2021-06-05 23:11:04,420 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 23:11:04,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:11:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:04,446 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:11:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:04,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:04,758 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 23:11:04,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:04,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:04,765 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 23:11:04,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:11:04,773 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 23:11:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414533348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:04,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:04,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-06-05 23:11:04,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929643301] [2021-06-05 23:11:04,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:11:04,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:04,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:11:04,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:11:04,774 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 23:11:05,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:05,041 INFO L93 Difference]: Finished difference Result 2191 states and 4418 transitions. [2021-06-05 23:11:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:11:05,041 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 23:11:05,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:05,045 INFO L225 Difference]: With dead ends: 2191 [2021-06-05 23:11:05,045 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 23:11:05,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:11:05,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 23:11:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-06-05 23:11:05,063 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 23:11:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 23:11:05,065 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 23:11:05,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:05,065 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 23:11:05,065 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 23:11:05,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 23:11:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:05,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:05,067 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:05,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:05,289 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:05,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-06-05 23:11:05,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:05,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58540327] [2021-06-05 23:11:05,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:05,530 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 23:11:05,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:05,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58540327] [2021-06-05 23:11:05,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58540327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:05,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758886883] [2021-06-05 23:11:05,530 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 23:11:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:05,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:11:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:05,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:05,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:05,906 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 23:11:05,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:05,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:05,914 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 23:11:05,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:11:05,922 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 23:11:05,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758886883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:05,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:05,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 23:11:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074835081] [2021-06-05 23:11:05,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:11:05,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:11:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:11:05,923 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 23:11:06,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:06,115 INFO L93 Difference]: Finished difference Result 1992 states and 4014 transitions. [2021-06-05 23:11:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:11:06,115 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 23:11:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:06,117 INFO L225 Difference]: With dead ends: 1992 [2021-06-05 23:11:06,117 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 23:11:06,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 426.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:11:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 23:11:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-06-05 23:11:06,129 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 23:11:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-06-05 23:11:06,130 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-06-05 23:11:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:06,130 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-06-05 23:11:06,130 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 23:11:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-06-05 23:11:06,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:11:06,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:06,131 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:06,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:11:06,332 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-06-05 23:11:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:06,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116253419] [2021-06-05 23:11:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:06,630 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 23:11:06,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:06,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116253419] [2021-06-05 23:11:06,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116253419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:06,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839361350] [2021-06-05 23:11:06,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:11:06,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:06,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:06,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:11:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:06,903 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-06-05 23:11:06,903 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 23:11:06,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:06,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:06,907 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 23:11:06,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-06-05 23:11:06,915 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 23:11:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839361350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:06,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:06,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 23:11:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185499402] [2021-06-05 23:11:06,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:11:06,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:11:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:11:06,916 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 23:11:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:07,219 INFO L93 Difference]: Finished difference Result 1629 states and 3230 transitions. [2021-06-05 23:11:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:11:07,219 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 23:11:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:07,221 INFO L225 Difference]: With dead ends: 1629 [2021-06-05 23:11:07,222 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 23:11:07,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 428.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:11:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 23:11:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-06-05 23:11:07,237 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 23:11:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-06-05 23:11:07,238 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-06-05 23:11:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:07,239 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-06-05 23:11:07,239 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 23:11:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-06-05 23:11:07,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:11:07,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:07,240 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:07,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:11:07,463 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:07,464 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-06-05 23:11:07,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:07,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575764584] [2021-06-05 23:11:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:07,511 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 23:11:07,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575764584] [2021-06-05 23:11:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575764584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893618634] [2021-06-05 23:11:07,512 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 23:11:07,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:11:07,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:07,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:11:07,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:07,603 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 23:11:07,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893618634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:07,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:07,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 23:11:07,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143156802] [2021-06-05 23:11:07,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:11:07,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:07,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:11:07,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:11:07,604 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 23:11:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:07,639 INFO L93 Difference]: Finished difference Result 1523 states and 3015 transitions. [2021-06-05 23:11:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:11:07,640 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 23:11:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:07,642 INFO L225 Difference]: With dead ends: 1523 [2021-06-05 23:11:07,642 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 23:11:07,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:11:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 23:11:07,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-06-05 23:11:07,656 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 23:11:07,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-06-05 23:11:07,658 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-06-05 23:11:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:07,658 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-06-05 23:11:07,658 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 23:11:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-06-05 23:11:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:11:07,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:07,660 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:07,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:11:07,883 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:07,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:07,884 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-06-05 23:11:07,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:07,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108971085] [2021-06-05 23:11:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:08,096 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 23:11:08,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108971085] [2021-06-05 23:11:08,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108971085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:08,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009079345] [2021-06-05 23:11:08,096 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 23:11:08,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:08,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:08,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 23:11:08,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:08,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:08,473 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 23:11:08,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:08,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:08,482 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 23:11:08,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-06-05 23:11:08,490 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 23:11:08,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009079345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:08,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:08,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-05 23:11:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299908379] [2021-06-05 23:11:08,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:11:08,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:08,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:11:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:11:08,491 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 23:11:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:09,246 INFO L93 Difference]: Finished difference Result 2817 states and 5721 transitions. [2021-06-05 23:11:09,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:11:09,247 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 23:11:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:09,249 INFO L225 Difference]: With dead ends: 2817 [2021-06-05 23:11:09,249 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 23:11:09,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 810.0ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 23:11:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-06-05 23:11:09,265 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 23:11:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-06-05 23:11:09,267 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-06-05 23:11:09,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:09,267 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-06-05 23:11:09,267 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 23:11:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-06-05 23:11:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:09,269 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:09,269 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:09,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:11:09,476 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:09,476 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-06-05 23:11:09,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:09,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86051914] [2021-06-05 23:11:09,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:09,737 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 23:11:09,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:09,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86051914] [2021-06-05 23:11:09,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86051914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:09,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847444270] [2021-06-05 23:11:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:11:09,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:11:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:09,781 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:11:09,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 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 23:11:10,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:10,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:10,443 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 23:11:10,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-06-05 23:11:10,462 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 23:11:10,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847444270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:10,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:10,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:11:10,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249009359] [2021-06-05 23:11:10,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:11:10,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:10,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:11:10,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:11:10,463 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 23:11:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:12,132 INFO L93 Difference]: Finished difference Result 2819 states and 5680 transitions. [2021-06-05 23:11:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:11:12,132 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 23:11:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:12,134 INFO L225 Difference]: With dead ends: 2819 [2021-06-05 23:11:12,134 INFO L226 Difference]: Without dead ends: 2609 [2021-06-05 23:11:12,135 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1667.2ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:11:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-06-05 23:11:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-06-05 23:11:12,148 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 23:11:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-06-05 23:11:12,150 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-06-05 23:11:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:12,150 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-06-05 23:11:12,150 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 23:11:12,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-06-05 23:11:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:12,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:12,151 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:12,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:12,352 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-06-05 23:11:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:12,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254626842] [2021-06-05 23:11:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:12,600 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 23:11:12,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:12,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254626842] [2021-06-05 23:11:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254626842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:12,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135597321] [2021-06-05 23:11:12,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:11:12,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:11:12,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:12,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:12,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:13,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:13,135 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 23:11:13,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:13,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:13,142 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 23:11:13,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:13,150 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 23:11:13,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135597321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:13,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:13,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 23:11:13,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192761743] [2021-06-05 23:11:13,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:13,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:13,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:13,151 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 23:11:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:13,505 INFO L93 Difference]: Finished difference Result 2311 states and 4610 transitions. [2021-06-05 23:11:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:11:13,506 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 23:11:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:13,508 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 23:11:13,508 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 23:11:13,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:13,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 23:11:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-06-05 23:11:13,521 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 23:11:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-06-05 23:11:13,522 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-06-05 23:11:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:13,522 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-06-05 23:11:13,522 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 23:11:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-06-05 23:11:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:13,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:13,524 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:11:13,724 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:13,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:13,724 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-06-05 23:11:13,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733003591] [2021-06-05 23:11:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:13,986 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 23:11:13,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:13,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733003591] [2021-06-05 23:11:13,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733003591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:13,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546841205] [2021-06-05 23:11:13,986 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 23:11:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:14,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:14,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:14,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:14,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:14,611 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 23:11:14,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:14,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:14,622 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 23:11:14,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:14,633 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 23:11:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546841205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 23:11:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468365780] [2021-06-05 23:11:14,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:11:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:11:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:11:14,634 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 23:11:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:15,189 INFO L93 Difference]: Finished difference Result 2400 states and 4757 transitions. [2021-06-05 23:11:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:11:15,189 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 23:11:15,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:15,191 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 23:11:15,191 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 23:11:15,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 922.0ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:11:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 23:11:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-06-05 23:11:15,209 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 23:11:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-06-05 23:11:15,211 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-06-05 23:11:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:15,211 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-06-05 23:11:15,211 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 23:11:15,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-06-05 23:11:15,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:15,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:15,213 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:15,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:15,434 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-06-05 23:11:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647149883] [2021-06-05 23:11:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:15,727 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 23:11:15,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:15,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647149883] [2021-06-05 23:11:15,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647149883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:15,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414792836] [2021-06-05 23:11:15,727 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 23:11:15,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:15,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:15,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:15,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:16,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:16,306 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 23:11:16,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:16,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:16,313 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 23:11:16,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:16,321 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 23:11:16,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414792836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:16,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:16,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 23:11:16,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146408760] [2021-06-05 23:11:16,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:16,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:16,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:16,322 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 23:11:16,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:16,903 INFO L93 Difference]: Finished difference Result 3106 states and 6326 transitions. [2021-06-05 23:11:16,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:11:16,903 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 23:11:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:16,905 INFO L225 Difference]: With dead ends: 3106 [2021-06-05 23:11:16,905 INFO L226 Difference]: Without dead ends: 2973 [2021-06-05 23:11:16,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 687.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:16,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-06-05 23:11:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-06-05 23:11:16,918 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 23:11:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-06-05 23:11:16,920 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-06-05 23:11:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:16,920 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-06-05 23:11:16,920 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 23:11:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-06-05 23:11:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:16,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:16,922 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:17,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:11:17,137 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:17,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:17,137 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-06-05 23:11:17,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:17,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104846661] [2021-06-05 23:11:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:17,381 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 23:11:17,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:17,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104846661] [2021-06-05 23:11:17,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104846661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:17,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414683525] [2021-06-05 23:11:17,382 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 23:11:17,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:11:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:17,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:11:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:17,932 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 23:11:17,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:17,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:17,939 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 23:11:17,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:17,947 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 23:11:17,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414683525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:17,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:17,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 23:11:17,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008503685] [2021-06-05 23:11:17,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:17,948 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 23:11:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:18,425 INFO L93 Difference]: Finished difference Result 2674 states and 5413 transitions. [2021-06-05 23:11:18,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:11:18,427 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 23:11:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:18,429 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 23:11:18,429 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 23:11:18,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 23:11:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-06-05 23:11:18,446 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 23:11:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-06-05 23:11:18,447 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-06-05 23:11:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:18,448 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-06-05 23:11:18,448 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 23:11:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-06-05 23:11:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:18,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:18,449 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:18,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:18,665 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:18,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-06-05 23:11:18,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:18,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752663830] [2021-06-05 23:11:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:18,973 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 23:11:18,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752663830] [2021-06-05 23:11:18,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752663830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:18,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256220429] [2021-06-05 23:11:18,973 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 23:11:19,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:19,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:19,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:19,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:19,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:19,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:19,591 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 23:11:19,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:19,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:19,598 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 23:11:19,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:19,606 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 23:11:19,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256220429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:19,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:19,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 23:11:19,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793546100] [2021-06-05 23:11:19,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:11:19,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:11:19,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:19,607 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 23:11:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:20,201 INFO L93 Difference]: Finished difference Result 2628 states and 5306 transitions. [2021-06-05 23:11:20,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:11:20,201 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 23:11:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:20,203 INFO L225 Difference]: With dead ends: 2628 [2021-06-05 23:11:20,203 INFO L226 Difference]: Without dead ends: 2562 [2021-06-05 23:11:20,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 697.9ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-06-05 23:11:20,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-06-05 23:11:20,219 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 23:11:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-06-05 23:11:20,221 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-06-05 23:11:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:20,222 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-06-05 23:11:20,222 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 23:11:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-06-05 23:11:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:20,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:20,223 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:11:20,445 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-06-05 23:11:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584271311] [2021-06-05 23:11:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:20,729 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 23:11:20,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584271311] [2021-06-05 23:11:20,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584271311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:20,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005294422] [2021-06-05 23:11:20,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:11:20,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:11:20,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:20,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:11:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:21,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:21,265 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 23:11:21,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:21,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:21,272 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 23:11:21,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:21,280 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 23:11:21,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005294422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:21,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:21,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 23:11:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459463727] [2021-06-05 23:11:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:11:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:11:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:21,281 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 23:11:21,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:21,689 INFO L93 Difference]: Finished difference Result 1841 states and 3650 transitions. [2021-06-05 23:11:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:11:21,693 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 23:11:21,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:21,695 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 23:11:21,695 INFO L226 Difference]: Without dead ends: 1810 [2021-06-05 23:11:21,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:11:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-06-05 23:11:21,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-06-05 23:11:21,706 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 23:11:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-06-05 23:11:21,708 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-06-05 23:11:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:21,708 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-06-05 23:11:21,708 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 23:11:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-06-05 23:11:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:21,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:21,709 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:21,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:21,910 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-06-05 23:11:21,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:21,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642954117] [2021-06-05 23:11:21,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:22,123 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 23:11:22,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642954117] [2021-06-05 23:11:22,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642954117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139337145] [2021-06-05 23:11:22,124 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 23:11:22,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:11:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:22,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:22,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:22,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:22,650 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 23:11:22,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:22,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:22,658 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 23:11:22,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:22,666 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 23:11:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139337145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:22,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:22,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-06-05 23:11:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774925358] [2021-06-05 23:11:22,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:11:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:11:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:11:22,667 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 23:11:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:23,363 INFO L93 Difference]: Finished difference Result 2027 states and 4033 transitions. [2021-06-05 23:11:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:11:23,364 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 23:11:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:23,365 INFO L225 Difference]: With dead ends: 2027 [2021-06-05 23:11:23,365 INFO L226 Difference]: Without dead ends: 1995 [2021-06-05 23:11:23,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 874.0ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:11:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-06-05 23:11:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-06-05 23:11:23,374 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 23:11:23,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-06-05 23:11:23,375 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-06-05 23:11:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:23,375 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-06-05 23:11:23,375 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 23:11:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-06-05 23:11:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:23,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:23,376 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:23,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:11:23,577 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:23,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:23,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-06-05 23:11:23,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:23,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852263138] [2021-06-05 23:11:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:23,837 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 23:11:23,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:23,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852263138] [2021-06-05 23:11:23,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852263138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:23,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022012118] [2021-06-05 23:11:23,837 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 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 23:11:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:23,864 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:24,390 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 23:11:24,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:24,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:24,399 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 23:11:24,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:24,409 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 23:11:24,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022012118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:24,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:24,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 23:11:24,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112798446] [2021-06-05 23:11:24,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:11:24,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:11:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:11:24,411 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 23:11:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:24,936 INFO L93 Difference]: Finished difference Result 1981 states and 3920 transitions. [2021-06-05 23:11:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:11:24,937 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 23:11:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:24,938 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 23:11:24,938 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 23:11:24,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:11:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 23:11:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-06-05 23:11:24,947 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 23:11:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-06-05 23:11:24,948 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-06-05 23:11:24,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:24,948 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-06-05 23:11:24,948 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 23:11:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-06-05 23:11:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:24,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:24,949 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:25,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:25,150 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-06-05 23:11:25,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:25,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728684279] [2021-06-05 23:11:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:25,445 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 23:11:25,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:25,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728684279] [2021-06-05 23:11:25,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728684279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:25,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258901117] [2021-06-05 23:11:25,445 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 23:11:25,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:25,471 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:26,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:26,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:26,011 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 23:11:26,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:26,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:26,018 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 23:11:26,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:26,026 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 23:11:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258901117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:26,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:26,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 23:11:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400584899] [2021-06-05 23:11:26,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:11:26,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:11:26,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:26,027 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 23:11:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:26,507 INFO L93 Difference]: Finished difference Result 2349 states and 4815 transitions. [2021-06-05 23:11:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:11:26,508 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 23:11:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:26,511 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 23:11:26,511 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 23:11:26,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:26,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 23:11:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-06-05 23:11:26,523 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 23:11:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-06-05 23:11:26,525 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-06-05 23:11:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:26,525 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-06-05 23:11:26,525 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 23:11:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-06-05 23:11:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:26,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:26,527 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:26,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:11:26,747 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:26,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-06-05 23:11:26,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:26,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023122680] [2021-06-05 23:11:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:27,072 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 23:11:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023122680] [2021-06-05 23:11:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023122680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473619841] [2021-06-05 23:11:27,072 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 23:11:27,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:11:27,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:27,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:27,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:27,645 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 23:11:27,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:27,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:27,652 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 23:11:27,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:27,661 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 23:11:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473619841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:27,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:27,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-06-05 23:11:27,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844091102] [2021-06-05 23:11:27,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:11:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:27,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:11:27,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:11:27,662 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 23:11:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:27,977 INFO L93 Difference]: Finished difference Result 2175 states and 4323 transitions. [2021-06-05 23:11:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:11:27,977 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 23:11:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:27,978 INFO L225 Difference]: With dead ends: 2175 [2021-06-05 23:11:27,978 INFO L226 Difference]: Without dead ends: 1948 [2021-06-05 23:11:27,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 783.5ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-06-05 23:11:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-06-05 23:11:27,988 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 23:11:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-06-05 23:11:27,989 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-06-05 23:11:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:27,989 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-06-05 23:11:27,989 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 23:11:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-06-05 23:11:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:27,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:27,991 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:28,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:11:28,191 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:28,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-06-05 23:11:28,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:28,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130889985] [2021-06-05 23:11:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:28,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:28,488 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 23:11:28,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130889985] [2021-06-05 23:11:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130889985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:28,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854713532] [2021-06-05 23:11:28,488 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 23:11:28,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:28,522 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:29,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:29,112 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 23:11:29,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:29,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:29,119 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 23:11:29,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:29,128 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 23:11:29,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854713532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:29,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:29,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-06-05 23:11:29,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990992377] [2021-06-05 23:11:29,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:29,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:29,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:29,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:29,129 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 23:11:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:29,605 INFO L93 Difference]: Finished difference Result 2695 states and 5412 transitions. [2021-06-05 23:11:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:11:29,605 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 23:11:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:29,607 INFO L225 Difference]: With dead ends: 2695 [2021-06-05 23:11:29,607 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 23:11:29,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 23:11:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-06-05 23:11:29,619 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 23:11:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-06-05 23:11:29,620 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-06-05 23:11:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:29,620 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-06-05 23:11:29,620 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 23:11:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-06-05 23:11:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:29,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:29,621 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:29,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:11:29,822 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:29,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-06-05 23:11:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:29,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630312757] [2021-06-05 23:11:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:30,140 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 23:11:30,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630312757] [2021-06-05 23:11:30,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630312757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:30,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762371178] [2021-06-05 23:11:30,140 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 23:11:30,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:11:30,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:30,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:11:30,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:30,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:30,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:30,744 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 23:11:30,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:30,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:30,751 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 23:11:30,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-06-05 23:11:30,759 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 23:11:30,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762371178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:30,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:30,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-06-05 23:11:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537339156] [2021-06-05 23:11:30,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:11:30,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:30,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:11:30,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:11:30,760 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 23:11:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:31,209 INFO L93 Difference]: Finished difference Result 2530 states and 5090 transitions. [2021-06-05 23:11:31,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:11:31,210 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 23:11:31,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:31,212 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 23:11:31,212 INFO L226 Difference]: Without dead ends: 2290 [2021-06-05 23:11:31,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 722.8ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:11:31,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-06-05 23:11:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-06-05 23:11:31,222 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 23:11:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-06-05 23:11:31,223 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-06-05 23:11:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:31,223 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-06-05 23:11:31,223 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 23:11:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-06-05 23:11:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:31,225 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:31,225 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:31,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:31,425 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-06-05 23:11:31,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:31,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689425376] [2021-06-05 23:11:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:31,706 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 23:11:31,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:31,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689425376] [2021-06-05 23:11:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689425376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:31,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138126768] [2021-06-05 23:11:31,706 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 23:11:31,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:11:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:31,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:31,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:32,255 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 23:11:32,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:32,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:32,262 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 23:11:32,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:32,274 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 23:11:32,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138126768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:32,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:32,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-06-05 23:11:32,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673262124] [2021-06-05 23:11:32,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:11:32,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:32,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:11:32,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:32,275 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 23:11:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:32,540 INFO L93 Difference]: Finished difference Result 1989 states and 3938 transitions. [2021-06-05 23:11:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:11:32,541 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 23:11:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:32,542 INFO L225 Difference]: With dead ends: 1989 [2021-06-05 23:11:32,542 INFO L226 Difference]: Without dead ends: 1967 [2021-06-05 23:11:32,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-06-05 23:11:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-06-05 23:11:32,551 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 23:11:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-06-05 23:11:32,553 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-06-05 23:11:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:32,553 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-06-05 23:11:32,553 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 23:11:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-06-05 23:11:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:32,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:32,554 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:32,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:32,755 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-06-05 23:11:32,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:32,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109197632] [2021-06-05 23:11:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:33,085 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 23:11:33,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109197632] [2021-06-05 23:11:33,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109197632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:33,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351647940] [2021-06-05 23:11:33,085 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 23:11:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:33,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:33,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:33,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:33,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:33,641 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 23:11:33,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:33,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:33,647 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 23:11:33,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:33,657 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 23:11:33,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351647940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:33,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:33,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 23:11:33,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284284172] [2021-06-05 23:11:33,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:33,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:33,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:33,658 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 23:11:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:34,236 INFO L93 Difference]: Finished difference Result 3158 states and 6442 transitions. [2021-06-05 23:11:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:11:34,236 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 23:11:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:34,238 INFO L225 Difference]: With dead ends: 3158 [2021-06-05 23:11:34,238 INFO L226 Difference]: Without dead ends: 3018 [2021-06-05 23:11:34,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:34,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-06-05 23:11:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-06-05 23:11:34,249 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 23:11:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-06-05 23:11:34,249 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-06-05 23:11:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:34,250 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-06-05 23:11:34,250 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 23:11:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-06-05 23:11:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:34,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:34,250 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:34,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:34,451 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-06-05 23:11:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:34,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097128291] [2021-06-05 23:11:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:34,721 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 23:11:34,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097128291] [2021-06-05 23:11:34,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097128291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:34,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943880990] [2021-06-05 23:11:34,721 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 23:11:34,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:11:34,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:34,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:35,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:35,249 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 23:11:35,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:35,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:35,256 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 23:11:35,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:35,265 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 23:11:35,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943880990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:35,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:35,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 23:11:35,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936701429] [2021-06-05 23:11:35,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:35,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:35,266 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 23:11:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:35,983 INFO L93 Difference]: Finished difference Result 2070 states and 4261 transitions. [2021-06-05 23:11:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:11:35,984 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 23:11:35,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:35,985 INFO L225 Difference]: With dead ends: 2070 [2021-06-05 23:11:35,985 INFO L226 Difference]: Without dead ends: 2009 [2021-06-05 23:11:35,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-06-05 23:11:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-06-05 23:11:35,993 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 23:11:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-06-05 23:11:35,994 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-06-05 23:11:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:35,995 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-06-05 23:11:35,995 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 23:11:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-06-05 23:11:35,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:35,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:35,996 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:36,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 23:11:36,218 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-06-05 23:11:36,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:36,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810562436] [2021-06-05 23:11:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:36,487 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 23:11:36,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:36,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810562436] [2021-06-05 23:11:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810562436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:36,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194055473] [2021-06-05 23:11:36,488 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 23:11:36,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:11:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:36,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:37,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:37,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:37,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:37,044 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 23:11:37,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:37,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:37,053 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 23:11:37,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:37,064 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 23:11:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194055473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:37,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:37,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-06-05 23:11:37,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83491296] [2021-06-05 23:11:37,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:11:37,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:37,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:11:37,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:11:37,065 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 23:11:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:37,497 INFO L93 Difference]: Finished difference Result 1866 states and 3843 transitions. [2021-06-05 23:11:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:11:37,497 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 23:11:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:37,498 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 23:11:37,498 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 23:11:37,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 638.1ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:11:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 23:11:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-06-05 23:11:37,506 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 23:11:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-06-05 23:11:37,507 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-06-05 23:11:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:37,507 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-06-05 23:11:37,507 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 23:11:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-06-05 23:11:37,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:37,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:37,508 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:37,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:37,708 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-06-05 23:11:37,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:37,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817388007] [2021-06-05 23:11:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:38,014 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 23:11:38,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817388007] [2021-06-05 23:11:38,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817388007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:38,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329863119] [2021-06-05 23:11:38,014 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 23:11:38,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:11:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:38,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:11:38,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:38,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:38,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:38,556 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 23:11:38,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:38,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:38,564 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 23:11:38,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:11:38,572 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 23:11:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329863119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:38,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:38,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-06-05 23:11:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741028313] [2021-06-05 23:11:38,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:11:38,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:11:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:11:38,573 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 23:11:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:11:39,229 INFO L93 Difference]: Finished difference Result 1711 states and 3435 transitions. [2021-06-05 23:11:39,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:11:39,229 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 23:11:39,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:11:39,230 INFO L225 Difference]: With dead ends: 1711 [2021-06-05 23:11:39,230 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 23:11:39,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:11:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 23:11:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-06-05 23:11:39,237 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 23:11:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-06-05 23:11:39,238 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-06-05 23:11:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:11:39,238 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-06-05 23:11:39,238 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 23:11:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-06-05 23:11:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:11:39,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:11:39,239 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:11:39,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:11:39,441 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:11:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:11:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-06-05 23:11:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:11:39,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972401596] [2021-06-05 23:11:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:11:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:11:39,726 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 23:11:39,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:11:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972401596] [2021-06-05 23:11:39,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972401596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:39,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887933112] [2021-06-05 23:11:39,726 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 23:11:39,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:11:39,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:11:39,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 23:11:39,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:11:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:11:45,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:11:45,410 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 23:11:45,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:11:45,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:11:45,421 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 23:11:45,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-06-05 23:11:45,449 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 23:11:45,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887933112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:11:45,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:11:45,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:11:45,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101892724] [2021-06-05 23:11:45,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:11:45,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:11:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:11:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=962, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 23:11:45,450 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 23:12:51,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:51,940 INFO L93 Difference]: Finished difference Result 2776 states and 5550 transitions. [2021-06-05 23:12:51,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 23:12:51,941 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 23:12:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:51,943 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 23:12:51,943 INFO L226 Difference]: Without dead ends: 2481 [2021-06-05 23:12:51,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 40149.8ms TimeCoverageRelationStatistics Valid=392, Invalid=5297, Unknown=11, NotChecked=0, Total=5700 [2021-06-05 23:12:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-06-05 23:12:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-06-05 23:12:51,953 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 23:12:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-06-05 23:12:51,954 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-06-05 23:12:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:51,954 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-06-05 23:12:51,954 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 23:12:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-06-05 23:12:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:12:51,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:51,955 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:52,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:52,156 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-06-05 23:12:52,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:52,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017088971] [2021-06-05 23:12:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:52,447 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 23:12:52,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017088971] [2021-06-05 23:12:52,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017088971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762754653] [2021-06-05 23:12:52,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:12:52,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:12:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:52,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:12:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:52,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:52,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:52,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:52,958 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 23:12:52,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:52,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:52,965 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 23:12:52,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:12:52,973 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 23:12:52,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762754653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:52,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:52,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-06-05 23:12:52,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973561839] [2021-06-05 23:12:52,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:12:52,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:12:52,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:12:52,974 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 23:12:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:53,258 INFO L93 Difference]: Finished difference Result 1646 states and 3342 transitions. [2021-06-05 23:12:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:12:53,258 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 23:12:53,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:53,259 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 23:12:53,259 INFO L226 Difference]: Without dead ends: 1624 [2021-06-05 23:12:53,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:12:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-06-05 23:12:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-06-05 23:12:53,269 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 23:12:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-06-05 23:12:53,269 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-06-05 23:12:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:53,270 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-06-05 23:12:53,270 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 23:12:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-06-05 23:12:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:12:53,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:53,271 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:53,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 23:12:53,471 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-06-05 23:12:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:53,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290287749] [2021-06-05 23:12:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:53,776 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 23:12:53,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:53,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290287749] [2021-06-05 23:12:53,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290287749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:53,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631214012] [2021-06-05 23:12:53,777 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 23:12:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:53,804 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:12:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:54,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:54,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:54,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:54,270 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 23:12:54,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:54,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:54,277 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 23:12:54,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:12:54,285 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 23:12:54,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631214012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:54,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:54,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-06-05 23:12:54,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878114681] [2021-06-05 23:12:54,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:12:54,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:54,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:12:54,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:12:54,286 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 23:12:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:54,692 INFO L93 Difference]: Finished difference Result 2173 states and 4427 transitions. [2021-06-05 23:12:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:12:54,692 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 23:12:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:54,694 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 23:12:54,694 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 23:12:54,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:12:54,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 23:12:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-06-05 23:12:54,703 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 23:12:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-06-05 23:12:54,704 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-06-05 23:12:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:54,704 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-06-05 23:12:54,704 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 23:12:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-06-05 23:12:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:12:54,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:54,705 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:54,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:54,906 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:54,906 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-06-05 23:12:54,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:54,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342116365] [2021-06-05 23:12:54,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:55,198 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 23:12:55,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342116365] [2021-06-05 23:12:55,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342116365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:55,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045363417] [2021-06-05 23:12:55,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:12:55,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:12:55,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:55,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:12:55,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:55,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:55,658 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 23:12:55,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:55,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:55,665 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 23:12:55,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:12:55,673 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 23:12:55,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045363417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:55,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:55,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 23:12:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950264213] [2021-06-05 23:12:55,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:12:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:12:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:12:55,674 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 23:12:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:56,390 INFO L93 Difference]: Finished difference Result 1889 states and 3781 transitions. [2021-06-05 23:12:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:12:56,390 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 23:12:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:56,392 INFO L225 Difference]: With dead ends: 1889 [2021-06-05 23:12:56,392 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 23:12:56,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 900.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:12:56,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 23:12:56,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-06-05 23:12:56,400 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 23:12:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-06-05 23:12:56,401 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-06-05 23:12:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-06-05 23:12:56,402 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 23:12:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-06-05 23:12:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:12:56,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:56,403 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:56,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:12:56,603 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-06-05 23:12:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:56,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559998901] [2021-06-05 23:12:56,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:56,855 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 23:12:56,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559998901] [2021-06-05 23:12:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559998901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013152857] [2021-06-05 23:12:56,855 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 23:12:56,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:12:56,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:56,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:12:56,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:57,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:57,490 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 23:12:57,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:57,505 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:12:57,507 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 23:12:57,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 23:12:57,515 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 23:12:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013152857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:57,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:57,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-06-05 23:12:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680962622] [2021-06-05 23:12:57,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:12:57,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:57,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:12:57,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:12:57,516 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 23:12:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:12:58,778 INFO L93 Difference]: Finished difference Result 2002 states and 3962 transitions. [2021-06-05 23:12:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:12:58,779 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 23:12:58,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:12:58,780 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 23:12:58,780 INFO L226 Difference]: Without dead ends: 1688 [2021-06-05 23:12:58,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1360.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:12:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-05 23:12:58,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-06-05 23:12:58,789 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 23:12:58,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-06-05 23:12:58,790 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-06-05 23:12:58,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:12:58,790 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-06-05 23:12:58,790 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 23:12:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-06-05 23:12:58,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:12:58,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:12:58,791 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:12:58,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:12:58,992 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:12:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:12:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-06-05 23:12:58,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:12:58,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636915251] [2021-06-05 23:12:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:12:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:12:59,248 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 23:12:59,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:12:59,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636915251] [2021-06-05 23:12:59,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636915251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:59,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984294607] [2021-06-05 23:12:59,248 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 23:12:59,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:12:59,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:12:59,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:12:59,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:12:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:59,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:12:59,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:12:59,676 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 23:12:59,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:12:59,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:12:59,684 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 23:12:59,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:12:59,692 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 23:12:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984294607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:12:59,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:12:59,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-06-05 23:12:59,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181869688] [2021-06-05 23:12:59,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:12:59,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:12:59,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:12:59,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:12:59,693 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 23:13:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:00,373 INFO L93 Difference]: Finished difference Result 2390 states and 4766 transitions. [2021-06-05 23:13:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:13:00,374 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 23:13:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:00,375 INFO L225 Difference]: With dead ends: 2390 [2021-06-05 23:13:00,375 INFO L226 Difference]: Without dead ends: 2089 [2021-06-05 23:13:00,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:00,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-05 23:13:00,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-06-05 23:13:00,386 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 23:13:00,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-06-05 23:13:00,387 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-06-05 23:13:00,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:00,388 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-06-05 23:13:00,388 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 23:13:00,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-06-05 23:13:00,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:00,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:00,389 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:00,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:00,589 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:00,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:00,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-06-05 23:13:00,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:00,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025794737] [2021-06-05 23:13:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:00,836 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 23:13:00,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:00,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025794737] [2021-06-05 23:13:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025794737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:00,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402619461] [2021-06-05 23:13:00,836 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 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 23:13:00,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:13:00,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:00,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:01,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:01,573 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 23:13:01,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:01,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:01,582 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 23:13:01,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-06-05 23:13:01,590 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 23:13:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402619461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:01,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:01,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 23:13:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447810544] [2021-06-05 23:13:01,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:13:01,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:13:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:13:01,591 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 23:13:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:04,051 INFO L93 Difference]: Finished difference Result 3509 states and 6960 transitions. [2021-06-05 23:13:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:13:04,051 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 23:13:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:04,053 INFO L225 Difference]: With dead ends: 3509 [2021-06-05 23:13:04,054 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 23:13:04,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2123.9ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:13:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 23:13:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-06-05 23:13:04,067 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 23:13:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-06-05 23:13:04,068 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-06-05 23:13:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:04,069 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-06-05 23:13:04,069 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 23:13:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-06-05 23:13:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:04,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:04,070 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:04,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:04,270 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:04,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:04,271 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-06-05 23:13:04,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:04,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099550487] [2021-06-05 23:13:04,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:04,589 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 23:13:04,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099550487] [2021-06-05 23:13:04,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099550487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945467166] [2021-06-05 23:13:04,590 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 23:13:04,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:13:04,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:04,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:05,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:05,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:05,047 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 23:13:05,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:05,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:05,054 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 23:13:05,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:05,062 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 23:13:05,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945467166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:05,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:05,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-05 23:13:05,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674216616] [2021-06-05 23:13:05,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:13:05,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:05,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:13:05,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:13:05,063 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 23:13:05,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:05,339 INFO L93 Difference]: Finished difference Result 2925 states and 5994 transitions. [2021-06-05 23:13:05,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:05,339 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 23:13:05,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:05,341 INFO L225 Difference]: With dead ends: 2925 [2021-06-05 23:13:05,341 INFO L226 Difference]: Without dead ends: 2803 [2021-06-05 23:13:05,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 622.0ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:13:05,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-06-05 23:13:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-06-05 23:13:05,360 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 23:13:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-06-05 23:13:05,362 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-06-05 23:13:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:05,362 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-06-05 23:13:05,362 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 23:13:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-06-05 23:13:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:05,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:05,364 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:05,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:05,581 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:05,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:05,581 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-06-05 23:13:05,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:05,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442266827] [2021-06-05 23:13:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:05,904 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 23:13:05,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442266827] [2021-06-05 23:13:05,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442266827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:05,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875687783] [2021-06-05 23:13:05,904 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 23:13:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:05,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:05,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:06,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:06,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:06,303 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 23:13:06,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:06,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:06,310 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 23:13:06,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:06,318 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 23:13:06,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875687783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:06,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:06,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 23:13:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161327556] [2021-06-05 23:13:06,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:13:06,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:06,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:13:06,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:13:06,319 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 23:13:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:07,015 INFO L93 Difference]: Finished difference Result 2411 states and 4790 transitions. [2021-06-05 23:13:07,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:07,015 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 23:13:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:07,017 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 23:13:07,017 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 23:13:07,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 23:13:07,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-06-05 23:13:07,032 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 23:13:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-06-05 23:13:07,035 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-06-05 23:13:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:07,035 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-06-05 23:13:07,035 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 23:13:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-06-05 23:13:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:07,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:07,037 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:07,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:07,253 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-06-05 23:13:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:07,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894518152] [2021-06-05 23:13:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:07,516 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 23:13:07,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:07,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894518152] [2021-06-05 23:13:07,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894518152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:07,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587433000] [2021-06-05 23:13:07,517 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 23:13:07,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:07,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:07,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:07,952 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 23:13:07,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:07,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:07,959 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 23:13:07,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:07,967 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 23:13:07,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587433000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:07,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:07,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-06-05 23:13:07,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254345628] [2021-06-05 23:13:07,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:13:07,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:13:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:13:07,968 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 23:13:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:08,373 INFO L93 Difference]: Finished difference Result 2847 states and 5742 transitions. [2021-06-05 23:13:08,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:13:08,373 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 23:13:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:08,375 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 23:13:08,375 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 23:13:08,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:13:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 23:13:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-06-05 23:13:08,392 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 23:13:08,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-06-05 23:13:08,394 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-06-05 23:13:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:08,394 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-06-05 23:13:08,394 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 23:13:08,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-06-05 23:13:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:08,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:08,396 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:08,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:08,613 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-06-05 23:13:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:08,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132232921] [2021-06-05 23:13:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:08,877 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 23:13:08,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:08,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132232921] [2021-06-05 23:13:08,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132232921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:08,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783599624] [2021-06-05 23:13:08,878 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 23:13:08,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:13:08,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:08,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:13:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:09,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:09,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:09,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:09,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:09,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:09,526 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 23:13:09,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:09,541 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:13:09,543 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 23:13:09,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-06-05 23:13:09,551 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 23:13:09,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783599624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:09,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:09,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-05 23:13:09,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008605671] [2021-06-05 23:13:09,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:13:09,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:09,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:13:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:13:09,552 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 23:13:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:11,075 INFO L93 Difference]: Finished difference Result 3263 states and 6548 transitions. [2021-06-05 23:13:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:13:11,075 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 23:13:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:11,077 INFO L225 Difference]: With dead ends: 3263 [2021-06-05 23:13:11,078 INFO L226 Difference]: Without dead ends: 3144 [2021-06-05 23:13:11,078 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1396.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:13:11,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-06-05 23:13:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-06-05 23:13:11,100 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 23:13:11,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 23:13:11,102 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 23:13:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:11,102 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 23:13:11,102 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 23:13:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 23:13:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:11,104 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:11,104 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:11,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:11,327 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-06-05 23:13:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:11,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323183512] [2021-06-05 23:13:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:11,669 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 23:13:11,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323183512] [2021-06-05 23:13:11,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323183512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:11,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563343783] [2021-06-05 23:13:11,669 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 23:13:11,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:11,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:11,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:11,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:12,241 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 23:13:12,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:12,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:12,249 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 23:13:12,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:12,257 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 23:13:12,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563343783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:12,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:12,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 23:13:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193701932] [2021-06-05 23:13:12,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:13:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:13:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:13:12,258 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 23:13:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:12,723 INFO L93 Difference]: Finished difference Result 3005 states and 6062 transitions. [2021-06-05 23:13:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:13:12,724 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 23:13:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:12,726 INFO L225 Difference]: With dead ends: 3005 [2021-06-05 23:13:12,726 INFO L226 Difference]: Without dead ends: 2947 [2021-06-05 23:13:12,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 622.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:13:12,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-06-05 23:13:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-06-05 23:13:12,747 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 23:13:12,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-06-05 23:13:12,749 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-06-05 23:13:12,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:12,749 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-06-05 23:13:12,749 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 23:13:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-06-05 23:13:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:13:12,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:12,750 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:12,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 23:13:12,951 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-06-05 23:13:12,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:12,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980592604] [2021-06-05 23:13:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:13,244 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 23:13:13,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980592604] [2021-06-05 23:13:13,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980592604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:13,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823283779] [2021-06-05 23:13:13,245 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 23:13:13,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:13:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:13,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:13:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:13,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:13,718 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 23:13:13,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:13,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:13,726 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 23:13:13,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:13,734 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 23:13:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823283779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:13,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:13,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-05 23:13:13,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615126144] [2021-06-05 23:13:13,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:13:13,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:13,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:13:13,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:13:13,735 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 23:13:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:14,105 INFO L93 Difference]: Finished difference Result 2585 states and 5147 transitions. [2021-06-05 23:13:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:13:14,105 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 23:13:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:14,108 INFO L225 Difference]: With dead ends: 2585 [2021-06-05 23:13:14,108 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 23:13:14,108 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:13:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 23:13:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-06-05 23:13:14,123 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 23:13:14,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-06-05 23:13:14,125 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-06-05 23:13:14,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:14,125 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-06-05 23:13:14,125 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 23:13:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-06-05 23:13:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:13:14,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:14,127 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:14,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:14,327 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-06-05 23:13:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:14,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097344083] [2021-06-05 23:13:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:14,582 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 23:13:14,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:14,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097344083] [2021-06-05 23:13:14,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097344083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:14,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352186967] [2021-06-05 23:13:14,582 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 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 23:13:14,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:13:14,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:14,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 23:13:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:15,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:15,059 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 23:13:15,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:15,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:15,066 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 23:13:15,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-06-05 23:13:15,075 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 23:13:15,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352186967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:15,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:15,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-06-05 23:13:15,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749307032] [2021-06-05 23:13:15,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:13:15,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:13:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:13:15,076 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 23:13:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:16,602 INFO L93 Difference]: Finished difference Result 3417 states and 6971 transitions. [2021-06-05 23:13:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:13:16,603 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 23:13:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:16,605 INFO L225 Difference]: With dead ends: 3417 [2021-06-05 23:13:16,605 INFO L226 Difference]: Without dead ends: 3297 [2021-06-05 23:13:16,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1428.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:13:16,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-06-05 23:13:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 1765. [2021-06-05 23:13:16,622 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 23:13:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3492 transitions. [2021-06-05 23:13:16,623 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3492 transitions. Word has length 42 [2021-06-05 23:13:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:16,623 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 3492 transitions. [2021-06-05 23:13:16,624 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 23:13:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3492 transitions. [2021-06-05 23:13:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:16,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:16,626 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:16,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 23:13:16,829 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 85 times [2021-06-05 23:13:16,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:16,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527509314] [2021-06-05 23:13:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:17,134 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 23:13:17,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:17,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527509314] [2021-06-05 23:13:17,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527509314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980604227] [2021-06-05 23:13:17,135 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 23:13:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:17,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:17,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:17,919 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 23:13:17,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:17,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:17,926 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 23:13:17,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:17,935 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 23:13:17,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980604227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:17,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:17,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 23:13:17,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869964114] [2021-06-05 23:13:17,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:13:17,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:17,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:13:17,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:17,936 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 23:13:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:18,907 INFO L93 Difference]: Finished difference Result 4013 states and 8194 transitions. [2021-06-05 23:13:18,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:18,908 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 23:13:18,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:18,911 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 23:13:18,911 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 23:13:18,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 880.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 23:13:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 1882. [2021-06-05 23:13:18,931 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 23:13:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3720 transitions. [2021-06-05 23:13:18,933 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3720 transitions. Word has length 43 [2021-06-05 23:13:18,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:18,933 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 3720 transitions. [2021-06-05 23:13:18,933 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 23:13:18,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3720 transitions. [2021-06-05 23:13:18,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:18,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:18,936 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:19,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:19,136 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 86 times [2021-06-05 23:13:19,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:19,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770813877] [2021-06-05 23:13:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:19,457 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 23:13:19,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:19,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770813877] [2021-06-05 23:13:19,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770813877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:19,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447471246] [2021-06-05 23:13:19,458 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 23:13:19,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:19,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:20,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:20,195 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 23:13:20,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:20,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:20,203 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 23:13:20,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:20,212 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 23:13:20,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447471246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:20,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:20,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 23:13:20,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102709547] [2021-06-05 23:13:20,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:13:20,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:20,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:13:20,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:20,213 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 23:13:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:21,252 INFO L93 Difference]: Finished difference Result 3614 states and 7238 transitions. [2021-06-05 23:13:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:21,253 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 23:13:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:21,255 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 23:13:21,255 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 23:13:21,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 837.7ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:13:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 23:13:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1927. [2021-06-05 23:13:21,271 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 23:13:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3812 transitions. [2021-06-05 23:13:21,272 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3812 transitions. Word has length 43 [2021-06-05 23:13:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:21,272 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 3812 transitions. [2021-06-05 23:13:21,272 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 23:13:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3812 transitions. [2021-06-05 23:13:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:21,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:21,274 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:21,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:21,477 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 87 times [2021-06-05 23:13:21,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:21,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287967455] [2021-06-05 23:13:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:21,811 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 23:13:21,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:21,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287967455] [2021-06-05 23:13:21,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287967455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:21,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423526298] [2021-06-05 23:13:21,811 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 23:13:21,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:13:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:21,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:13:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:22,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:22,598 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 23:13:22,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:22,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:22,606 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 23:13:22,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-06-05 23:13:22,614 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 23:13:22,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423526298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:22,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:22,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:13:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396888927] [2021-06-05 23:13:22,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:13:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:13:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:22,615 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 23:13:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:23,427 INFO L93 Difference]: Finished difference Result 4338 states and 8863 transitions. [2021-06-05 23:13:23,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:23,427 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 23:13:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:23,430 INFO L225 Difference]: With dead ends: 4338 [2021-06-05 23:13:23,430 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 23:13:23,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 912.7ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 23:13:23,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 1762. [2021-06-05 23:13:23,445 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 23:13:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3488 transitions. [2021-06-05 23:13:23,447 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3488 transitions. Word has length 43 [2021-06-05 23:13:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:23,447 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3488 transitions. [2021-06-05 23:13:23,447 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 23:13:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3488 transitions. [2021-06-05 23:13:23,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:23,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:23,448 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:23,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:23,649 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:23,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:23,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 88 times [2021-06-05 23:13:23,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:23,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807883152] [2021-06-05 23:13:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:23,978 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 23:13:23,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:23,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807883152] [2021-06-05 23:13:23,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807883152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:23,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009873680] [2021-06-05 23:13:23,978 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 23:13:24,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:13:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:24,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:24,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:24,773 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 23:13:24,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:24,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:24,781 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 23:13:24,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:24,790 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 23:13:24,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009873680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:24,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:24,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:13:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381419118] [2021-06-05 23:13:24,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:13:24,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:13:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:24,791 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 23:13:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:25,444 INFO L93 Difference]: Finished difference Result 3585 states and 7206 transitions. [2021-06-05 23:13:25,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:13:25,445 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 23:13:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:25,448 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 23:13:25,448 INFO L226 Difference]: Without dead ends: 3557 [2021-06-05 23:13:25,448 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-06-05 23:13:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 1810. [2021-06-05 23:13:25,465 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 23:13:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3577 transitions. [2021-06-05 23:13:25,467 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3577 transitions. Word has length 43 [2021-06-05 23:13:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3577 transitions. [2021-06-05 23:13:25,467 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 23:13:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3577 transitions. [2021-06-05 23:13:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:25,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:25,468 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:25,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:25,669 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 89 times [2021-06-05 23:13:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:25,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879568371] [2021-06-05 23:13:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:26,032 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 23:13:26,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:26,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879568371] [2021-06-05 23:13:26,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879568371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:26,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091235709] [2021-06-05 23:13:26,033 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 23:13:26,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:13:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:26,063 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:26,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:26,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:26,817 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 23:13:26,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:26,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:26,825 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 23:13:26,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:26,833 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 23:13:26,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091235709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:26,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:26,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:13:26,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476393285] [2021-06-05 23:13:26,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:13:26,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:13:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:26,834 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 23:13:27,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:27,454 INFO L93 Difference]: Finished difference Result 3241 states and 6488 transitions. [2021-06-05 23:13:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:13:27,455 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 23:13:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:27,458 INFO L225 Difference]: With dead ends: 3241 [2021-06-05 23:13:27,458 INFO L226 Difference]: Without dead ends: 3198 [2021-06-05 23:13:27,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 912.0ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-06-05 23:13:27,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1867. [2021-06-05 23:13:27,473 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 23:13:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3679 transitions. [2021-06-05 23:13:27,475 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3679 transitions. Word has length 43 [2021-06-05 23:13:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:27,475 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 3679 transitions. [2021-06-05 23:13:27,475 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 23:13:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3679 transitions. [2021-06-05 23:13:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:27,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:27,477 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:27,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 23:13:27,677 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:27,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-06-05 23:13:27,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:27,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368611126] [2021-06-05 23:13:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:27,923 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 23:13:27,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:27,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368611126] [2021-06-05 23:13:27,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368611126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:27,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890755953] [2021-06-05 23:13:27,924 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 23:13:27,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:13:27,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:27,953 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:28,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:28,664 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 23:13:28,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:28,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:28,675 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 23:13:28,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:28,686 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 23:13:28,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890755953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:28,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:28,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 23:13:28,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2227122] [2021-06-05 23:13:28,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:28,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:28,687 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 23:13:29,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:29,323 INFO L93 Difference]: Finished difference Result 3671 states and 7373 transitions. [2021-06-05 23:13:29,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:13:29,323 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 23:13:29,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:29,326 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 23:13:29,326 INFO L226 Difference]: Without dead ends: 3369 [2021-06-05 23:13:29,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:13:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-06-05 23:13:29,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2005. [2021-06-05 23:13:29,342 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 23:13:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3940 transitions. [2021-06-05 23:13:29,344 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3940 transitions. Word has length 43 [2021-06-05 23:13:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:29,344 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 3940 transitions. [2021-06-05 23:13:29,344 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 23:13:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3940 transitions. [2021-06-05 23:13:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:29,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:29,345 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:29,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:29,546 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:29,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-06-05 23:13:29,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:29,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594586470] [2021-06-05 23:13:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:29,870 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 23:13:29,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:29,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594586470] [2021-06-05 23:13:29,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594586470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:29,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593892148] [2021-06-05 23:13:29,870 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 23:13:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:29,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:30,610 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 23:13:30,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:30,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:30,618 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 23:13:30,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:30,626 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 23:13:30,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593892148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:30,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:30,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:13:30,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420578520] [2021-06-05 23:13:30,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:13:30,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:13:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:30,627 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 23:13:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:31,127 INFO L93 Difference]: Finished difference Result 3677 states and 7454 transitions. [2021-06-05 23:13:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:13:31,128 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 23:13:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:31,130 INFO L225 Difference]: With dead ends: 3677 [2021-06-05 23:13:31,131 INFO L226 Difference]: Without dead ends: 3555 [2021-06-05 23:13:31,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:13:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-06-05 23:13:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2026. [2021-06-05 23:13:31,146 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 23:13:31,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3982 transitions. [2021-06-05 23:13:31,148 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3982 transitions. Word has length 43 [2021-06-05 23:13:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:31,148 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 3982 transitions. [2021-06-05 23:13:31,148 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 23:13:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3982 transitions. [2021-06-05 23:13:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:31,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:31,149 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:31,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 23:13:31,350 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-06-05 23:13:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:31,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651159155] [2021-06-05 23:13:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:31,605 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 23:13:31,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:31,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651159155] [2021-06-05 23:13:31,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651159155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:31,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175025725] [2021-06-05 23:13:31,606 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 23:13:31,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:13:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:31,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:13:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:32,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:32,313 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 23:13:32,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:32,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:13:32,320 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 23:13:32,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:13:32,328 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 23:13:32,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175025725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:32,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:32,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-06-05 23:13:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028780668] [2021-06-05 23:13:32,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:13:32,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:13:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:13:32,329 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 23:13:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:13:33,244 INFO L93 Difference]: Finished difference Result 2865 states and 5658 transitions. [2021-06-05 23:13:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:13:33,244 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 23:13:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:13:33,247 INFO L225 Difference]: With dead ends: 2865 [2021-06-05 23:13:33,247 INFO L226 Difference]: Without dead ends: 2573 [2021-06-05 23:13:33,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1180.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:13:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-06-05 23:13:33,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2152. [2021-06-05 23:13:33,262 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 23:13:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4228 transitions. [2021-06-05 23:13:33,264 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4228 transitions. Word has length 43 [2021-06-05 23:13:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:13:33,264 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 4228 transitions. [2021-06-05 23:13:33,264 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 23:13:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4228 transitions. [2021-06-05 23:13:33,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:13:33,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:13:33,266 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:13:33,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:13:33,466 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:13:33,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:13:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-06-05 23:13:33,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:13:33,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627090981] [2021-06-05 23:13:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:13:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:13:33,771 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 23:13:33,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:13:33,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627090981] [2021-06-05 23:13:33,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627090981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:33,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759843931] [2021-06-05 23:13:33,772 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 23:13:33,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:13:33,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:13:33,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 23:13:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:13:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:13:53,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:13:53,923 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 23:13:53,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:13:53,944 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-06-05 23:13:53,945 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 23:13:53,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:167, output treesize:7 [2021-06-05 23:13:53,954 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 23:13:53,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759843931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:13:53,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:13:53,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-06-05 23:13:53,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983164002] [2021-06-05 23:13:53,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:13:53,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:13:53,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:13:53,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=840, Unknown=6, NotChecked=0, Total=930 [2021-06-05 23:13:53,955 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 23:14:09,324 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2021-06-05 23:14:31,796 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-06-05 23:14:41,985 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 23:14:48,665 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 23:14:53,574 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2021-06-05 23:15:26,716 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 23:15:32,544 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-05 23:15:54,034 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-06-05 23:16:06,834 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 23:18:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:13,998 INFO L93 Difference]: Finished difference Result 3588 states and 7132 transitions. [2021-06-05 23:18:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:18:14,028 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 23:18:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:14,031 INFO L225 Difference]: With dead ends: 3588 [2021-06-05 23:18:14,031 INFO L226 Difference]: Without dead ends: 3323 [2021-06-05 23:18:14,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 91719.1ms TimeCoverageRelationStatistics Valid=196, Invalid=2038, Unknown=22, NotChecked=0, Total=2256 [2021-06-05 23:18:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-06-05 23:18:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2161. [2021-06-05 23:18:14,047 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 23:18:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 4241 transitions. [2021-06-05 23:18:14,049 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 4241 transitions. Word has length 43 [2021-06-05 23:18:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:14,049 INFO L482 AbstractCegarLoop]: Abstraction has 2161 states and 4241 transitions. [2021-06-05 23:18:14,049 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 23:18:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 4241 transitions. [2021-06-05 23:18:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:14,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:14,051 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:14,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:14,251 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:14,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:14,252 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-06-05 23:18:14,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:14,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033659395] [2021-06-05 23:18:14,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:14,676 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 23:18:14,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:14,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033659395] [2021-06-05 23:18:14,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033659395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:14,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162935128] [2021-06-05 23:18:14,677 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 23:18:14,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:14,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:14,708 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:15,476 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 23:18:15,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:15,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:15,486 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 23:18:15,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:15,501 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 23:18:15,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162935128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:15,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:15,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-06-05 23:18:15,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338094288] [2021-06-05 23:18:15,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:15,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:15,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:15,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:15,502 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 23:18:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:16,281 INFO L93 Difference]: Finished difference Result 3990 states and 7983 transitions. [2021-06-05 23:18:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:18:16,281 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 23:18:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:16,284 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 23:18:16,285 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 23:18:16,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 998.5ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 23:18:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2170. [2021-06-05 23:18:16,305 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 23:18:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4250 transitions. [2021-06-05 23:18:16,307 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4250 transitions. Word has length 43 [2021-06-05 23:18:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:16,307 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 4250 transitions. [2021-06-05 23:18:16,307 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 23:18:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4250 transitions. [2021-06-05 23:18:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:16,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:16,308 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 23:18:16,509 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-06-05 23:18:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002311311] [2021-06-05 23:18:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:16,843 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 23:18:16,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002311311] [2021-06-05 23:18:16,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002311311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:16,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210223264] [2021-06-05 23:18:16,844 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 23:18:16,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:18:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:16,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:18:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:17,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:17,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,674 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 23:18:17,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:17,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:17,682 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 23:18:17,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:17,690 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 23:18:17,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210223264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:17,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:17,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:18:17,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678617810] [2021-06-05 23:18:17,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:18:17,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:18:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:18:17,691 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 23:18:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:18,380 INFO L93 Difference]: Finished difference Result 3989 states and 7996 transitions. [2021-06-05 23:18:18,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:18:18,380 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 23:18:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:18,384 INFO L225 Difference]: With dead ends: 3989 [2021-06-05 23:18:18,384 INFO L226 Difference]: Without dead ends: 3711 [2021-06-05 23:18:18,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 927.9ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:18:18,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-05 23:18:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2218. [2021-06-05 23:18:18,407 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 23:18:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 23:18:18,409 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 23:18:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:18,409 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 23:18:18,409 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 23:18:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 23:18:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:18,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:18,411 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:18,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 23:18:18,611 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-06-05 23:18:18,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:18,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232846531] [2021-06-05 23:18:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:18,955 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 23:18:18,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:18,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232846531] [2021-06-05 23:18:18,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232846531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:18,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722113062] [2021-06-05 23:18:18,955 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 23:18:18,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:18:18,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:18,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:18,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:19,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:19,719 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 23:18:19,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:19,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:19,729 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 23:18:19,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:19,738 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 23:18:19,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722113062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:19,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:19,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-06-05 23:18:19,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280198368] [2021-06-05 23:18:19,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:18:19,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:19,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:18:19,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:18:19,739 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 23:18:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:20,533 INFO L93 Difference]: Finished difference Result 3315 states and 6548 transitions. [2021-06-05 23:18:20,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:18:20,533 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 23:18:20,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:20,535 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 23:18:20,535 INFO L226 Difference]: Without dead ends: 3300 [2021-06-05 23:18:20,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 901.7ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:18:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-06-05 23:18:20,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2218. [2021-06-05 23:18:20,551 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 23:18:20,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-06-05 23:18:20,553 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-06-05 23:18:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:20,553 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-06-05 23:18:20,553 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 23:18:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-06-05 23:18:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:20,555 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:20,555 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:20,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:20,755 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:20,756 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-06-05 23:18:20,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:20,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223274585] [2021-06-05 23:18:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:21,114 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 23:18:21,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:21,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223274585] [2021-06-05 23:18:21,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223274585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:21,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589997894] [2021-06-05 23:18:21,114 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 23:18:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:21,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:21,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:21,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:21,910 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 23:18:21,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:21,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:21,920 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 23:18:21,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:21,931 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 23:18:21,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589997894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:21,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:21,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 23:18:21,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298930817] [2021-06-05 23:18:21,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:21,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:21,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:21,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:21,933 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 23:18:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:22,506 INFO L93 Difference]: Finished difference Result 4305 states and 8580 transitions. [2021-06-05 23:18:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:18:22,506 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 23:18:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:22,510 INFO L225 Difference]: With dead ends: 4305 [2021-06-05 23:18:22,510 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 23:18:22,510 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 23:18:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2425. [2021-06-05 23:18:22,531 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 23:18:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 4736 transitions. [2021-06-05 23:18:22,533 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 4736 transitions. Word has length 43 [2021-06-05 23:18:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:22,533 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 4736 transitions. [2021-06-05 23:18:22,534 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 23:18:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 4736 transitions. [2021-06-05 23:18:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:22,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:22,535 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:22,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 23:18:22,744 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-06-05 23:18:22,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:22,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438140935] [2021-06-05 23:18:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:23,024 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 23:18:23,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:23,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438140935] [2021-06-05 23:18:23,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438140935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:23,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328377159] [2021-06-05 23:18:23,024 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 23:18:23,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:18:23,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:23,052 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:23,734 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 23:18:23,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:23,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:23,742 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 23:18:23,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:23,750 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 23:18:23,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328377159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:23,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:23,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 23:18:23,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154606098] [2021-06-05 23:18:23,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:18:23,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:23,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:18:23,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:18:23,752 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 23:18:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:24,892 INFO L93 Difference]: Finished difference Result 3888 states and 7643 transitions. [2021-06-05 23:18:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:18:24,892 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 23:18:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:24,895 INFO L225 Difference]: With dead ends: 3888 [2021-06-05 23:18:24,895 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 23:18:24,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1148.8ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:18:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 23:18:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2797. [2021-06-05 23:18:24,919 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 23:18:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 5466 transitions. [2021-06-05 23:18:24,921 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 5466 transitions. Word has length 43 [2021-06-05 23:18:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:24,921 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 5466 transitions. [2021-06-05 23:18:24,922 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 23:18:24,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 5466 transitions. [2021-06-05 23:18:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:24,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:24,923 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:25,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 23:18:25,124 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:25,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:25,124 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-06-05 23:18:25,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:25,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122479189] [2021-06-05 23:18:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:25,465 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 23:18:25,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122479189] [2021-06-05 23:18:25,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122479189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:25,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718797445] [2021-06-05 23:18:25,465 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 23:18:25,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:18:25,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:25,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:25,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:26,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:26,191 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 23:18:26,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:26,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:26,199 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 23:18:26,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:26,207 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 23:18:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718797445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:26,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:26,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 23:18:26,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212500945] [2021-06-05 23:18:26,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:26,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:26,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:26,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:26,208 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 23:18:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:26,918 INFO L93 Difference]: Finished difference Result 4489 states and 9045 transitions. [2021-06-05 23:18:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:18:26,919 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 23:18:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:26,922 INFO L225 Difference]: With dead ends: 4489 [2021-06-05 23:18:26,922 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 23:18:26,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 23:18:26,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2827. [2021-06-05 23:18:26,948 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 23:18:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 5526 transitions. [2021-06-05 23:18:26,950 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 5526 transitions. Word has length 43 [2021-06-05 23:18:26,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:26,951 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 5526 transitions. [2021-06-05 23:18:26,951 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 23:18:26,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 5526 transitions. [2021-06-05 23:18:26,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:26,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:26,952 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:27,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 23:18:27,154 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:27,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:27,154 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-06-05 23:18:27,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:27,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352740685] [2021-06-05 23:18:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:27,430 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 23:18:27,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:27,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352740685] [2021-06-05 23:18:27,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352740685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:27,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907872665] [2021-06-05 23:18:27,431 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 23:18:27,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:27,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:27,457 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:27,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:28,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:28,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:28,139 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 23:18:28,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:28,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:28,147 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 23:18:28,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:28,155 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 23:18:28,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907872665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:28,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:28,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-06-05 23:18:28,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874450066] [2021-06-05 23:18:28,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:18:28,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:18:28,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:18:28,156 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 23:18:29,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:29,180 INFO L93 Difference]: Finished difference Result 4129 states and 8090 transitions. [2021-06-05 23:18:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:18:29,181 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 23:18:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:29,184 INFO L225 Difference]: With dead ends: 4129 [2021-06-05 23:18:29,184 INFO L226 Difference]: Without dead ends: 3769 [2021-06-05 23:18:29,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1195.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:18:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-06-05 23:18:29,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3141. [2021-06-05 23:18:29,212 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 23:18:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 6147 transitions. [2021-06-05 23:18:29,216 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 6147 transitions. Word has length 43 [2021-06-05 23:18:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:29,216 INFO L482 AbstractCegarLoop]: Abstraction has 3141 states and 6147 transitions. [2021-06-05 23:18:29,216 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 23:18:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 6147 transitions. [2021-06-05 23:18:29,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:29,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:29,219 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:29,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:29,430 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:29,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-06-05 23:18:29,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:29,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924661008] [2021-06-05 23:18:29,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:29,853 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 23:18:29,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924661008] [2021-06-05 23:18:29,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924661008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:29,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027007585] [2021-06-05 23:18:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:18:29,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:18:29,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:29,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:18:29,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:30,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:30,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:30,605 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 23:18:30,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:30,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:30,613 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 23:18:30,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:30,621 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 23:18:30,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027007585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:30,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:30,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-06-05 23:18:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732228491] [2021-06-05 23:18:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:18:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:18:30,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:30,622 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 23:18:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:31,235 INFO L93 Difference]: Finished difference Result 5700 states and 11356 transitions. [2021-06-05 23:18:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:18:31,235 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 23:18:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:31,240 INFO L225 Difference]: With dead ends: 5700 [2021-06-05 23:18:31,240 INFO L226 Difference]: Without dead ends: 5434 [2021-06-05 23:18:31,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 960.8ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-06-05 23:18:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3258. [2021-06-05 23:18:31,271 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 23:18:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 6387 transitions. [2021-06-05 23:18:31,274 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 6387 transitions. Word has length 43 [2021-06-05 23:18:31,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:31,274 INFO L482 AbstractCegarLoop]: Abstraction has 3258 states and 6387 transitions. [2021-06-05 23:18:31,274 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 23:18:31,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 6387 transitions. [2021-06-05 23:18:31,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:31,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:31,276 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:31,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 23:18:31,477 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:31,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:31,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-06-05 23:18:31,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:31,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421864981] [2021-06-05 23:18:31,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:31,865 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 23:18:31,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:31,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421864981] [2021-06-05 23:18:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421864981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:31,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598579937] [2021-06-05 23:18:31,866 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 23:18:31,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:18:31,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:31,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:18:31,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:32,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:32,611 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 23:18:32,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:32,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:32,622 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 23:18:32,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:32,632 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 23:18:32,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598579937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:32,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:32,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 23:18:32,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326090617] [2021-06-05 23:18:32,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:32,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:32,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:32,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:32,633 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 23:18:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:32,907 INFO L93 Difference]: Finished difference Result 4967 states and 9920 transitions. [2021-06-05 23:18:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:18:32,908 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 23:18:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:32,911 INFO L225 Difference]: With dead ends: 4967 [2021-06-05 23:18:32,911 INFO L226 Difference]: Without dead ends: 4691 [2021-06-05 23:18:32,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 920.6ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:32,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-06-05 23:18:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3321. [2021-06-05 23:18:32,956 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 23:18:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 23:18:32,959 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 23:18:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:32,959 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 23:18:32,959 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 23:18:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 23:18:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:32,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:32,961 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:33,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 23:18:33,162 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:33,162 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-06-05 23:18:33,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:33,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092503756] [2021-06-05 23:18:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:33,593 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 23:18:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092503756] [2021-06-05 23:18:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092503756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973283447] [2021-06-05 23:18:33,593 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 23:18:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:33,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:34,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:34,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:34,410 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 23:18:34,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:34,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:34,418 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 23:18:34,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:34,427 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 23:18:34,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973283447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:34,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:34,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 23:18:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958087667] [2021-06-05 23:18:34,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:34,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:34,428 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 23:18:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:35,169 INFO L93 Difference]: Finished difference Result 4281 states and 8456 transitions. [2021-06-05 23:18:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:18:35,170 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 23:18:35,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:35,173 INFO L225 Difference]: With dead ends: 4281 [2021-06-05 23:18:35,173 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 23:18:35,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1019.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 23:18:35,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3321. [2021-06-05 23:18:35,210 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 23:18:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-06-05 23:18:35,215 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-06-05 23:18:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-06-05 23:18:35,215 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 23:18:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-06-05 23:18:35,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:35,217 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:35,217 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:35,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:35,418 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:35,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:35,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-06-05 23:18:35,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:35,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065289680] [2021-06-05 23:18:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:35,789 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 23:18:35,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065289680] [2021-06-05 23:18:35,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065289680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:35,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777007608] [2021-06-05 23:18:35,789 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 23:18:35,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:18:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:35,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:36,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:36,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:36,511 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 23:18:36,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:36,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:36,520 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 23:18:36,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:36,528 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 23:18:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777007608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:36,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:36,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 23:18:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17014240] [2021-06-05 23:18:36,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:18:36,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:18:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:36,529 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 23:18:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:36,897 INFO L93 Difference]: Finished difference Result 6029 states and 12136 transitions. [2021-06-05 23:18:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:18:36,898 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 23:18:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:36,903 INFO L225 Difference]: With dead ends: 6029 [2021-06-05 23:18:36,903 INFO L226 Difference]: Without dead ends: 5816 [2021-06-05 23:18:36,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 886.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:36,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-06-05 23:18:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 3424. [2021-06-05 23:18:36,942 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 23:18:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 6726 transitions. [2021-06-05 23:18:36,946 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 6726 transitions. Word has length 43 [2021-06-05 23:18:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:36,946 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 6726 transitions. [2021-06-05 23:18:36,946 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 23:18:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 6726 transitions. [2021-06-05 23:18:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:36,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:36,950 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:37,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:37,166 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-06-05 23:18:37,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:37,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146897381] [2021-06-05 23:18:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:37,541 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 23:18:37,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:37,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146897381] [2021-06-05 23:18:37,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146897381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:37,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190462540] [2021-06-05 23:18:37,541 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 23:18:37,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:18:37,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:37,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:38,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:38,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:38,277 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 23:18:38,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:38,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:38,288 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 23:18:38,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:38,299 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 23:18:38,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190462540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:38,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:38,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 23:18:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615478843] [2021-06-05 23:18:38,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:18:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:18:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:38,300 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 23:18:39,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:39,090 INFO L93 Difference]: Finished difference Result 5238 states and 10412 transitions. [2021-06-05 23:18:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:18:39,090 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 23:18:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:39,094 INFO L225 Difference]: With dead ends: 5238 [2021-06-05 23:18:39,094 INFO L226 Difference]: Without dead ends: 5180 [2021-06-05 23:18:39,094 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2021-06-05 23:18:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3451. [2021-06-05 23:18:39,123 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 23:18:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 23:18:39,126 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 23:18:39,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:39,127 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 23:18:39,127 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 23:18:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 23:18:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:39,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:39,129 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:39,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:39,333 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:39,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:39,333 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-06-05 23:18:39,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:39,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648608690] [2021-06-05 23:18:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:39,688 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 23:18:39,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:39,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648608690] [2021-06-05 23:18:39,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648608690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:39,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581679357] [2021-06-05 23:18:39,688 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 23:18:39,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:39,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:40,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:40,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:40,386 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 23:18:40,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:40,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:40,397 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 23:18:40,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:40,408 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 23:18:40,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581679357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:40,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:40,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-06-05 23:18:40,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874453361] [2021-06-05 23:18:40,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:18:40,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:40,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:18:40,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:40,410 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 23:18:41,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:41,214 INFO L93 Difference]: Finished difference Result 4745 states and 9374 transitions. [2021-06-05 23:18:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:18:41,214 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 23:18:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:41,218 INFO L225 Difference]: With dead ends: 4745 [2021-06-05 23:18:41,218 INFO L226 Difference]: Without dead ends: 4730 [2021-06-05 23:18:41,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 856.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:18:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-06-05 23:18:41,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3451. [2021-06-05 23:18:41,251 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 23:18:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-06-05 23:18:41,254 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-06-05 23:18:41,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:41,254 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-06-05 23:18:41,255 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 23:18:41,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-06-05 23:18:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:41,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:41,257 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:41,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:41,457 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:41,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-06-05 23:18:41,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:41,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497974384] [2021-06-05 23:18:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:41,731 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 23:18:41,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:41,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497974384] [2021-06-05 23:18:41,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497974384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:41,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959896875] [2021-06-05 23:18:41,731 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 23:18:41,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:18:41,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:41,761 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:41,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:42,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:42,390 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 23:18:42,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:42,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:42,401 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 23:18:42,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:42,412 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 23:18:42,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959896875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:42,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:42,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-06-05 23:18:42,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591604988] [2021-06-05 23:18:42,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:18:42,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:42,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:18:42,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:18:42,413 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 23:18:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:42,935 INFO L93 Difference]: Finished difference Result 5475 states and 10796 transitions. [2021-06-05 23:18:42,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:18:42,935 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 23:18:42,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:42,939 INFO L225 Difference]: With dead ends: 5475 [2021-06-05 23:18:42,940 INFO L226 Difference]: Without dead ends: 5191 [2021-06-05 23:18:42,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 747.0ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:18:42,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-06-05 23:18:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3671. [2021-06-05 23:18:42,971 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 23:18:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7239 transitions. [2021-06-05 23:18:42,975 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7239 transitions. Word has length 43 [2021-06-05 23:18:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:42,975 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7239 transitions. [2021-06-05 23:18:42,975 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 23:18:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7239 transitions. [2021-06-05 23:18:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:42,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:42,980 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:43,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 23:18:43,193 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-06-05 23:18:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:43,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215027266] [2021-06-05 23:18:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:43,533 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 23:18:43,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:43,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215027266] [2021-06-05 23:18:43,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215027266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:43,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924702647] [2021-06-05 23:18:43,534 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 23:18:43,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:18:43,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:43,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:43,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:44,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:44,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:44,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:44,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:44,201 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 23:18:44,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:44,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:44,209 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 23:18:44,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:44,217 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 23:18:44,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924702647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:44,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:44,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 23:18:44,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879672652] [2021-06-05 23:18:44,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:18:44,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:44,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:18:44,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:18:44,218 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 23:18:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:44,522 INFO L93 Difference]: Finished difference Result 5940 states and 12046 transitions. [2021-06-05 23:18:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:18:44,523 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 23:18:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:44,528 INFO L225 Difference]: With dead ends: 5940 [2021-06-05 23:18:44,528 INFO L226 Difference]: Without dead ends: 5733 [2021-06-05 23:18:44,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:18:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-06-05 23:18:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 3683. [2021-06-05 23:18:44,567 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 23:18:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 7265 transitions. [2021-06-05 23:18:44,572 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 7265 transitions. Word has length 43 [2021-06-05 23:18:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:44,572 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 7265 transitions. [2021-06-05 23:18:44,572 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 23:18:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 7265 transitions. [2021-06-05 23:18:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:44,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:44,575 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:44,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 23:18:44,777 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-06-05 23:18:44,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:44,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910127591] [2021-06-05 23:18:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:45,207 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 23:18:45,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:45,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910127591] [2021-06-05 23:18:45,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910127591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:45,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399650704] [2021-06-05 23:18:45,208 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 23:18:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:45,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:45,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:45,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:45,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:46,005 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 23:18:46,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:46,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:46,012 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 23:18:46,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:46,021 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 23:18:46,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399650704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:46,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:46,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-06-05 23:18:46,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104662485] [2021-06-05 23:18:46,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:18:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:18:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:18:46,022 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 23:18:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:46,587 INFO L93 Difference]: Finished difference Result 4821 states and 9570 transitions. [2021-06-05 23:18:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:18:46,588 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 23:18:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:46,592 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 23:18:46,592 INFO L226 Difference]: Without dead ends: 4806 [2021-06-05 23:18:46,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 973.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:18:46,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-06-05 23:18:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3686. [2021-06-05 23:18:46,620 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 23:18:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 7271 transitions. [2021-06-05 23:18:46,623 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 7271 transitions. Word has length 43 [2021-06-05 23:18:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:46,623 INFO L482 AbstractCegarLoop]: Abstraction has 3686 states and 7271 transitions. [2021-06-05 23:18:46,623 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 23:18:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 7271 transitions. [2021-06-05 23:18:46,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:46,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:46,626 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:46,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 23:18:46,826 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:46,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-06-05 23:18:46,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:46,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738926311] [2021-06-05 23:18:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:47,177 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 23:18:47,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738926311] [2021-06-05 23:18:47,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738926311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:47,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171148010] [2021-06-05 23:18:47,178 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 23:18:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:18:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:47,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:47,864 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 23:18:47,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:47,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:47,872 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 23:18:47,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:47,880 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 23:18:47,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171148010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:47,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:47,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-06-05 23:18:47,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558649608] [2021-06-05 23:18:47,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:18:47,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:47,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:18:47,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:18:47,881 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 23:18:48,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:48,438 INFO L93 Difference]: Finished difference Result 5294 states and 10543 transitions. [2021-06-05 23:18:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:18:48,438 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 23:18:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:48,443 INFO L225 Difference]: With dead ends: 5294 [2021-06-05 23:18:48,443 INFO L226 Difference]: Without dead ends: 5264 [2021-06-05 23:18:48,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:18:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2021-06-05 23:18:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 3722. [2021-06-05 23:18:48,479 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 23:18:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 7346 transitions. [2021-06-05 23:18:48,483 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 7346 transitions. Word has length 43 [2021-06-05 23:18:48,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:48,484 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 7346 transitions. [2021-06-05 23:18:48,484 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 23:18:48,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 7346 transitions. [2021-06-05 23:18:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:48,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:48,486 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:48,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:48,687 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-06-05 23:18:48,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:48,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831403155] [2021-06-05 23:18:48,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:49,048 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 23:18:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831403155] [2021-06-05 23:18:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831403155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975747695] [2021-06-05 23:18:49,048 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 23:18:49,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:18:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:49,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:49,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:49,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:49,948 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 23:18:49,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:49,972 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:18:49,974 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 23:18:49,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-06-05 23:18:49,985 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 23:18:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975747695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:49,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:49,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-06-05 23:18:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452828018] [2021-06-05 23:18:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:49,987 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 23:18:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:52,375 INFO L93 Difference]: Finished difference Result 5592 states and 11061 transitions. [2021-06-05 23:18:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:18:52,375 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 23:18:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:52,380 INFO L225 Difference]: With dead ends: 5592 [2021-06-05 23:18:52,380 INFO L226 Difference]: Without dead ends: 5209 [2021-06-05 23:18:52,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2465.2ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:18:52,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-06-05 23:18:52,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4162. [2021-06-05 23:18:52,425 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 23:18:52,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 8197 transitions. [2021-06-05 23:18:52,429 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 8197 transitions. Word has length 43 [2021-06-05 23:18:52,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:52,429 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 8197 transitions. [2021-06-05 23:18:52,429 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 23:18:52,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 8197 transitions. [2021-06-05 23:18:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:52,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:52,431 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:52,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 23:18:52,633 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:52,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:52,633 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-06-05 23:18:52,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:52,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811579963] [2021-06-05 23:18:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:52,917 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 23:18:52,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:52,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811579963] [2021-06-05 23:18:52,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811579963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:52,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410556431] [2021-06-05 23:18:52,917 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 23:18:52,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:18:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:52,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:53,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:53,458 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 23:18:53,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:53,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:53,465 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 23:18:53,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:53,474 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 23:18:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410556431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:53,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:53,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 23:18:53,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850629388] [2021-06-05 23:18:53,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:18:53,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:53,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:18:53,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:18:53,474 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 23:18:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:54,783 INFO L93 Difference]: Finished difference Result 7069 states and 14124 transitions. [2021-06-05 23:18:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:18:54,783 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 23:18:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:54,788 INFO L225 Difference]: With dead ends: 7069 [2021-06-05 23:18:54,788 INFO L226 Difference]: Without dead ends: 6666 [2021-06-05 23:18:54,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1472.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:18:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-06-05 23:18:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4415. [2021-06-05 23:18:54,825 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 23:18:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 8707 transitions. [2021-06-05 23:18:54,829 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 8707 transitions. Word has length 43 [2021-06-05 23:18:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:54,829 INFO L482 AbstractCegarLoop]: Abstraction has 4415 states and 8707 transitions. [2021-06-05 23:18:54,829 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 23:18:54,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 8707 transitions. [2021-06-05 23:18:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:54,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:54,832 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:55,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:55,033 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-06-05 23:18:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:55,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415632876] [2021-06-05 23:18:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:55,367 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 23:18:55,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415632876] [2021-06-05 23:18:55,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415632876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:55,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582364364] [2021-06-05 23:18:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:18:55,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:18:55,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:55,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:56,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:56,165 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 23:18:56,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:56,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:56,172 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 23:18:56,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-06-05 23:18:56,193 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 23:18:56,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582364364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:56,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:56,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-06-05 23:18:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142726593] [2021-06-05 23:18:56,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:18:56,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:56,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:18:56,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:18:56,194 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 23:18:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:57,677 INFO L93 Difference]: Finished difference Result 5648 states and 11150 transitions. [2021-06-05 23:18:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:18:57,677 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 23:18:57,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:57,681 INFO L225 Difference]: With dead ends: 5648 [2021-06-05 23:18:57,682 INFO L226 Difference]: Without dead ends: 5539 [2021-06-05 23:18:57,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1729.0ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:18:57,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-06-05 23:18:57,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4486. [2021-06-05 23:18:57,716 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 23:18:57,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8856 transitions. [2021-06-05 23:18:57,720 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8856 transitions. Word has length 43 [2021-06-05 23:18:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:57,721 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 8856 transitions. [2021-06-05 23:18:57,721 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 23:18:57,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8856 transitions. [2021-06-05 23:18:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:57,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:57,723 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:57,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 23:18:57,924 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-06-05 23:18:57,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:57,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073347781] [2021-06-05 23:18:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:58,198 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 23:18:58,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:58,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073347781] [2021-06-05 23:18:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073347781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413898010] [2021-06-05 23:18:58,199 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 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 23:18:58,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:18:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:58,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:58,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:58,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:58,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:58,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:18:58,750 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 23:18:58,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:58,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:58,757 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 23:18:58,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:18:58,766 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 23:18:58,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413898010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:58,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:58,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 23:18:58,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280065149] [2021-06-05 23:18:58,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:18:58,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:18:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:18:58,767 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 23:18:59,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:59,148 INFO L93 Difference]: Finished difference Result 6505 states and 12851 transitions. [2021-06-05 23:18:59,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:18:59,149 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 23:18:59,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:59,154 INFO L225 Difference]: With dead ends: 6505 [2021-06-05 23:18:59,154 INFO L226 Difference]: Without dead ends: 6237 [2021-06-05 23:18:59,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:18:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-06-05 23:18:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4662. [2021-06-05 23:18:59,193 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 23:18:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 9215 transitions. [2021-06-05 23:18:59,197 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 9215 transitions. Word has length 43 [2021-06-05 23:18:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:59,197 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 9215 transitions. [2021-06-05 23:18:59,197 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 23:18:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 9215 transitions. [2021-06-05 23:18:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:18:59,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:59,201 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:59,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:59,401 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:59,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-06-05 23:18:59,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:59,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003150684] [2021-06-05 23:18:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:59,696 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 23:18:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003150684] [2021-06-05 23:18:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003150684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304981659] [2021-06-05 23:18:59,697 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 23:18:59,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:59,724 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:18:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:00,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:00,257 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 23:19:00,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:00,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:00,264 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 23:19:00,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:00,273 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 23:19:00,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304981659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:00,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:00,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-06-05 23:19:00,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859685980] [2021-06-05 23:19:00,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:19:00,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:19:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:19:00,274 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 23:19:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:00,701 INFO L93 Difference]: Finished difference Result 6935 states and 13838 transitions. [2021-06-05 23:19:00,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:19:00,701 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 23:19:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:00,708 INFO L225 Difference]: With dead ends: 6935 [2021-06-05 23:19:00,708 INFO L226 Difference]: Without dead ends: 6690 [2021-06-05 23:19:00,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:19:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2021-06-05 23:19:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 5133. [2021-06-05 23:19:00,761 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 23:19:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10219 transitions. [2021-06-05 23:19:00,768 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10219 transitions. Word has length 43 [2021-06-05 23:19:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:00,768 INFO L482 AbstractCegarLoop]: Abstraction has 5133 states and 10219 transitions. [2021-06-05 23:19:00,768 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 23:19:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10219 transitions. [2021-06-05 23:19:00,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:00,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:00,772 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:00,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:00,972 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-06-05 23:19:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520127361] [2021-06-05 23:19:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:01,266 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 23:19:01,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520127361] [2021-06-05 23:19:01,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520127361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:01,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001367530] [2021-06-05 23:19:01,266 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 23:19:01,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:01,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:01,293 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:01,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:01,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:01,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:01,841 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 23:19:01,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:01,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:01,848 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 23:19:01,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:01,857 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 23:19:01,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001367530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:01,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:01,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-06-05 23:19:01,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133802506] [2021-06-05 23:19:01,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:19:01,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:01,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:19:01,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:19:01,857 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 23:19:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:02,575 INFO L93 Difference]: Finished difference Result 7659 states and 15381 transitions. [2021-06-05 23:19:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:19:02,575 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 23:19:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:02,582 INFO L225 Difference]: With dead ends: 7659 [2021-06-05 23:19:02,582 INFO L226 Difference]: Without dead ends: 7594 [2021-06-05 23:19:02,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 700.3ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:19:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-06-05 23:19:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 4965. [2021-06-05 23:19:02,633 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 23:19:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 9851 transitions. [2021-06-05 23:19:02,638 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 9851 transitions. Word has length 43 [2021-06-05 23:19:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:02,638 INFO L482 AbstractCegarLoop]: Abstraction has 4965 states and 9851 transitions. [2021-06-05 23:19:02,638 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 23:19:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 9851 transitions. [2021-06-05 23:19:02,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:02,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:02,642 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:02,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 23:19:02,842 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-06-05 23:19:02,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:02,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390010905] [2021-06-05 23:19:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:03,192 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 23:19:03,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390010905] [2021-06-05 23:19:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390010905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:03,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104842883] [2021-06-05 23:19:03,192 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 23:19:03,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:19:03,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:03,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:03,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:03,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:03,798 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 23:19:03,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:03,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:03,806 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 23:19:03,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:03,814 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 23:19:03,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104842883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:03,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:03,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-05 23:19:03,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630050188] [2021-06-05 23:19:03,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:19:03,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:03,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:19:03,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:19:03,815 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 23:19:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:04,230 INFO L93 Difference]: Finished difference Result 6720 states and 13442 transitions. [2021-06-05 23:19:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:19:04,230 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 23:19:04,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:04,236 INFO L225 Difference]: With dead ends: 6720 [2021-06-05 23:19:04,236 INFO L226 Difference]: Without dead ends: 6615 [2021-06-05 23:19:04,236 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 768.8ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:19:04,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2021-06-05 23:19:04,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 4980. [2021-06-05 23:19:04,275 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 23:19:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9882 transitions. [2021-06-05 23:19:04,280 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9882 transitions. Word has length 43 [2021-06-05 23:19:04,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:04,280 INFO L482 AbstractCegarLoop]: Abstraction has 4980 states and 9882 transitions. [2021-06-05 23:19:04,280 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 23:19:04,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9882 transitions. [2021-06-05 23:19:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:04,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:04,283 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:04,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:19:04,484 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:04,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:04,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-06-05 23:19:04,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:04,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194091795] [2021-06-05 23:19:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:04,796 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 23:19:04,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194091795] [2021-06-05 23:19:04,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194091795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:04,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314817073] [2021-06-05 23:19:04,796 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 23:19:04,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:04,827 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:05,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:05,313 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 23:19:05,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:05,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:05,320 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 23:19:05,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:05,328 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 23:19:05,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314817073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:05,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:05,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-06-05 23:19:05,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453374284] [2021-06-05 23:19:05,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:19:05,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:05,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:19:05,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:19:05,329 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 23:19:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:05,626 INFO L93 Difference]: Finished difference Result 6288 states and 12461 transitions. [2021-06-05 23:19:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:19:05,627 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 23:19:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:05,631 INFO L225 Difference]: With dead ends: 6288 [2021-06-05 23:19:05,632 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 23:19:05,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:19:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 23:19:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5116. [2021-06-05 23:19:05,671 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 23:19:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 10177 transitions. [2021-06-05 23:19:05,677 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 10177 transitions. Word has length 43 [2021-06-05 23:19:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:05,677 INFO L482 AbstractCegarLoop]: Abstraction has 5116 states and 10177 transitions. [2021-06-05 23:19:05,677 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 23:19:05,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 10177 transitions. [2021-06-05 23:19:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:05,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:05,680 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:05,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:05,880 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:05,881 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-06-05 23:19:05,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:05,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163101821] [2021-06-05 23:19:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:06,191 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 23:19:06,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:06,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163101821] [2021-06-05 23:19:06,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163101821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:06,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780116088] [2021-06-05 23:19:06,192 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 23:19:06,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:19:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:06,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:06,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:06,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:06,797 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 23:19:06,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:06,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:06,805 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 23:19:06,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:06,813 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 23:19:06,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780116088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:06,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:06,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-06-05 23:19:06,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510526004] [2021-06-05 23:19:06,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:19:06,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:19:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:19:06,814 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 23:19:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:07,163 INFO L93 Difference]: Finished difference Result 6874 states and 13706 transitions. [2021-06-05 23:19:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:19:07,163 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 23:19:07,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:07,169 INFO L225 Difference]: With dead ends: 6874 [2021-06-05 23:19:07,170 INFO L226 Difference]: Without dead ends: 6829 [2021-06-05 23:19:07,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:19:07,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-06-05 23:19:07,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5057. [2021-06-05 23:19:07,217 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 23:19:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 10050 transitions. [2021-06-05 23:19:07,223 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 10050 transitions. Word has length 43 [2021-06-05 23:19:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:07,223 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 10050 transitions. [2021-06-05 23:19:07,223 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 23:19:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 10050 transitions. [2021-06-05 23:19:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:07,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:07,227 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:07,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 23:19:07,428 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-06-05 23:19:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:07,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992628671] [2021-06-05 23:19:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:07,779 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 23:19:07,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:07,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992628671] [2021-06-05 23:19:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992628671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:07,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253026012] [2021-06-05 23:19:07,780 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 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 23:19:07,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:19:07,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:07,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:19:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:08,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:08,844 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 23:19:08,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:08,860 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-06-05 23:19:08,861 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 23:19:08,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-06-05 23:19:08,869 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 23:19:08,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253026012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:08,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:08,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-06-05 23:19:08,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747948411] [2021-06-05 23:19:08,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:19:08,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:19:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:19:08,870 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 23:19:13,054 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-05 23:19:14,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:14,623 INFO L93 Difference]: Finished difference Result 7825 states and 15639 transitions. [2021-06-05 23:19:14,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:19:14,624 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 23:19:14,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:14,631 INFO L225 Difference]: With dead ends: 7825 [2021-06-05 23:19:14,631 INFO L226 Difference]: Without dead ends: 7519 [2021-06-05 23:19:14,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3680.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:19:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-06-05 23:19:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 5176. [2021-06-05 23:19:14,680 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 23:19:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 23:19:14,686 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 23:19:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:14,686 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 23:19:14,686 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 23:19:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 23:19:14,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:14,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:14,690 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:14,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:14,890 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:14,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:14,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-06-05 23:19:14,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:14,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95319801] [2021-06-05 23:19:14,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:15,251 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 23:19:15,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:15,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95319801] [2021-06-05 23:19:15,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95319801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:15,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851230951] [2021-06-05 23:19:15,251 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 23:19:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:15,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:15,851 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 23:19:15,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:15,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:15,861 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 23:19:15,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:15,872 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 23:19:15,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851230951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:15,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:15,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-06-05 23:19:15,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409392779] [2021-06-05 23:19:15,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:19:15,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:15,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:19:15,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:19:15,873 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 23:19:16,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:16,384 INFO L93 Difference]: Finished difference Result 6970 states and 13987 transitions. [2021-06-05 23:19:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:19:16,384 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 23:19:16,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:16,391 INFO L225 Difference]: With dead ends: 6970 [2021-06-05 23:19:16,391 INFO L226 Difference]: Without dead ends: 6925 [2021-06-05 23:19:16,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 780.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:19:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-06-05 23:19:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 5176. [2021-06-05 23:19:16,438 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 23:19:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-06-05 23:19:16,444 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-06-05 23:19:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:16,444 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-06-05 23:19:16,444 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 23:19:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-06-05 23:19:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:19:16,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:16,448 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:16,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:19:16,649 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-06-05 23:19:16,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556056843] [2021-06-05 23:19:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:16,999 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 23:19:16,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:16,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556056843] [2021-06-05 23:19:16,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556056843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130251869] [2021-06-05 23:19:17,000 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 23:19:17,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:17,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:17,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:17,450 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-06-05 23:19:17,450 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 23:19:17,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:17,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:17,454 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 23:19:17,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-06-05 23:19:17,483 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 23:19:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130251869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:17,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:17,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-06-05 23:19:17,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317635307] [2021-06-05 23:19:17,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:19:17,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:17,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:19:17,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:19:17,484 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 23:19:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:17,863 INFO L93 Difference]: Finished difference Result 6778 states and 13577 transitions. [2021-06-05 23:19:17,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:19:17,864 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 23:19:17,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:17,871 INFO L225 Difference]: With dead ends: 6778 [2021-06-05 23:19:17,871 INFO L226 Difference]: Without dead ends: 6763 [2021-06-05 23:19:17,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 663.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:19:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-06-05 23:19:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5183. [2021-06-05 23:19:17,924 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 23:19:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 10320 transitions. [2021-06-05 23:19:17,932 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 10320 transitions. Word has length 43 [2021-06-05 23:19:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:17,932 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 10320 transitions. [2021-06-05 23:19:17,932 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 23:19:17,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 10320 transitions. [2021-06-05 23:19:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:19:17,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:17,936 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:18,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:18,138 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1365327806, now seen corresponding path program 123 times [2021-06-05 23:19:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:18,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401897675] [2021-06-05 23:19:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:18,188 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 23:19:18,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:18,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401897675] [2021-06-05 23:19:18,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401897675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:18,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820988586] [2021-06-05 23:19:18,189 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 23:19:18,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:19:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:19:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:18,280 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 23:19:18,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820988586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:18,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:18,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 23:19:18,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354184805] [2021-06-05 23:19:18,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:19:18,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:19:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:19:18,281 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 23:19:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:18,321 INFO L93 Difference]: Finished difference Result 5616 states and 11180 transitions. [2021-06-05 23:19:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:19:18,322 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 23:19:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:18,326 INFO L225 Difference]: With dead ends: 5616 [2021-06-05 23:19:18,326 INFO L226 Difference]: Without dead ends: 5602 [2021-06-05 23:19:18,327 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:19:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-06-05 23:19:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5194. [2021-06-05 23:19:18,371 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 23:19:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 10347 transitions. [2021-06-05 23:19:18,378 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 10347 transitions. Word has length 44 [2021-06-05 23:19:18,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:18,378 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 10347 transitions. [2021-06-05 23:19:18,378 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 23:19:18,378 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 10347 transitions. [2021-06-05 23:19:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-05 23:19:18,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:18,383 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:18,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 23:19:18,584 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 124 times [2021-06-05 23:19:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:18,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591649871] [2021-06-05 23:19:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:18,642 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 23:19:18,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591649871] [2021-06-05 23:19:18,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591649871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963698877] [2021-06-05 23:19:18,642 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 23:19:18,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:18,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:18,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:19:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:18,754 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 23:19:18,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963698877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:18,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:18,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 23:19:18,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269776806] [2021-06-05 23:19:18,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:19:18,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:18,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:19:18,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:19:18,755 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 23:19:18,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:18,801 INFO L93 Difference]: Finished difference Result 5677 states and 11327 transitions. [2021-06-05 23:19:18,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:19:18,802 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 23:19:18,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:18,805 INFO L225 Difference]: With dead ends: 5677 [2021-06-05 23:19:18,806 INFO L226 Difference]: Without dead ends: 5668 [2021-06-05 23:19:18,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:19:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-06-05 23:19:18,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5257. [2021-06-05 23:19:18,848 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 23:19:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 10488 transitions. [2021-06-05 23:19:18,854 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 10488 transitions. Word has length 44 [2021-06-05 23:19:18,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:18,854 INFO L482 AbstractCegarLoop]: Abstraction has 5257 states and 10488 transitions. [2021-06-05 23:19:18,854 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 23:19:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 10488 transitions. [2021-06-05 23:19:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:19:18,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:18,857 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:19,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 23:19:19,058 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 125 times [2021-06-05 23:19:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:19,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281847719] [2021-06-05 23:19:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:19,398 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 23:19:19,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281847719] [2021-06-05 23:19:19,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281847719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:19,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882275525] [2021-06-05 23:19:19,399 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 23:19:19,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 23:19:19,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:19,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-06-05 23:19:19,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:19,970 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 23:19:19,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:19,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:19,977 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 23:19:19,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-06-05 23:19:19,986 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 23:19:19,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882275525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:19,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:19,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-06-05 23:19:19,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812452391] [2021-06-05 23:19:19,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:19:19,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:19,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:19:19,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:19:19,987 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 23:19:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:21,983 INFO L93 Difference]: Finished difference Result 8586 states and 17459 transitions. [2021-06-05 23:19:21,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:19:21,984 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 23:19:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:21,991 INFO L225 Difference]: With dead ends: 8586 [2021-06-05 23:19:21,991 INFO L226 Difference]: Without dead ends: 8466 [2021-06-05 23:19:21,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2182.3ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:19:21,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-06-05 23:19:22,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5282. [2021-06-05 23:19:22,040 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 23:19:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 10542 transitions. [2021-06-05 23:19:22,045 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 10542 transitions. Word has length 46 [2021-06-05 23:19:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:22,046 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 10542 transitions. [2021-06-05 23:19:22,046 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 23:19:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 10542 transitions. [2021-06-05 23:19:22,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:22,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:22,049 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:22,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:22,249 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 126 times [2021-06-05 23:19:22,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:22,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769485425] [2021-06-05 23:19:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:22,600 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 23:19:22,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769485425] [2021-06-05 23:19:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769485425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727016720] [2021-06-05 23:19:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:22,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:19:22,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:22,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:19:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:23,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:23,553 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 23:19:23,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:23,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:23,561 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 23:19:23,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:23,569 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 23:19:23,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727016720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:23,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:23,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:23,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253163450] [2021-06-05 23:19:23,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:23,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:23,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:23,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:23,570 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 23:19:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:24,206 INFO L93 Difference]: Finished difference Result 9697 states and 19645 transitions. [2021-06-05 23:19:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:19:24,207 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 23:19:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:24,215 INFO L225 Difference]: With dead ends: 9697 [2021-06-05 23:19:24,215 INFO L226 Difference]: Without dead ends: 9575 [2021-06-05 23:19:24,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1063.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-06-05 23:19:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5303. [2021-06-05 23:19:24,273 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 23:19:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10584 transitions. [2021-06-05 23:19:24,279 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10584 transitions. Word has length 47 [2021-06-05 23:19:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:24,279 INFO L482 AbstractCegarLoop]: Abstraction has 5303 states and 10584 transitions. [2021-06-05 23:19:24,280 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 23:19:24,280 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10584 transitions. [2021-06-05 23:19:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:24,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:24,283 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:24,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:24,484 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:24,484 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 127 times [2021-06-05 23:19:24,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:24,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769022614] [2021-06-05 23:19:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:24,845 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 23:19:24,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:24,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769022614] [2021-06-05 23:19:24,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769022614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:24,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099295275] [2021-06-05 23:19:24,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:24,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:19:24,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:25,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:25,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:25,780 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 23:19:25,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:25,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:25,788 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 23:19:25,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 23:19:25,796 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 23:19:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099295275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:25,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:25,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:25,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817638582] [2021-06-05 23:19:25,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:25,797 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 23:19:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:26,312 INFO L93 Difference]: Finished difference Result 9274 states and 18836 transitions. [2021-06-05 23:19:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:19:26,312 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 23:19:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:26,321 INFO L225 Difference]: With dead ends: 9274 [2021-06-05 23:19:26,321 INFO L226 Difference]: Without dead ends: 9152 [2021-06-05 23:19:26,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1069.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-06-05 23:19:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5363. [2021-06-05 23:19:26,406 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 23:19:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 10704 transitions. [2021-06-05 23:19:26,412 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 10704 transitions. Word has length 47 [2021-06-05 23:19:26,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:26,412 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 10704 transitions. [2021-06-05 23:19:26,412 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 23:19:26,412 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 10704 transitions. [2021-06-05 23:19:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:26,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:26,415 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:26,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:26,616 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:26,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 128 times [2021-06-05 23:19:26,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:26,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192263053] [2021-06-05 23:19:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:26,943 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 23:19:26,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192263053] [2021-06-05 23:19:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192263053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988063877] [2021-06-05 23:19:26,943 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 23:19:26,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:26,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:19:26,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:27,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:27,918 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 23:19:27,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:27,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:27,928 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 23:19:27,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:27,937 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 23:19:27,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988063877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:27,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:27,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 23:19:27,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050918184] [2021-06-05 23:19:27,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:19:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:19:27,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:19:27,938 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 23:19:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:28,619 INFO L93 Difference]: Finished difference Result 9393 states and 18931 transitions. [2021-06-05 23:19:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:19:28,619 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 23:19:28,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:28,628 INFO L225 Difference]: With dead ends: 9393 [2021-06-05 23:19:28,628 INFO L226 Difference]: Without dead ends: 9327 [2021-06-05 23:19:28,628 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1040.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:19:28,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-06-05 23:19:28,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 5330. [2021-06-05 23:19:28,684 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 23:19:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10627 transitions. [2021-06-05 23:19:28,690 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10627 transitions. Word has length 47 [2021-06-05 23:19:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:28,690 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10627 transitions. [2021-06-05 23:19:28,690 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 23:19:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10627 transitions. [2021-06-05 23:19:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:28,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:28,694 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:28,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:28,895 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:28,896 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 129 times [2021-06-05 23:19:28,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:28,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739604226] [2021-06-05 23:19:28,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:29,239 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 23:19:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739604226] [2021-06-05 23:19:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739604226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029336865] [2021-06-05 23:19:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:29,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:19:29,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:29,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:19:29,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:30,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:30,397 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 23:19:30,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:30,412 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-06-05 23:19:30,413 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 23:19:30,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-06-05 23:19:30,421 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 23:19:30,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029336865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:30,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:30,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:30,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997351656] [2021-06-05 23:19:30,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:30,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:30,422 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 23:19:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:34,465 INFO L93 Difference]: Finished difference Result 9678 states and 19547 transitions. [2021-06-05 23:19:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:19:34,465 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 23:19:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:34,473 INFO L225 Difference]: With dead ends: 9678 [2021-06-05 23:19:34,473 INFO L226 Difference]: Without dead ends: 9218 [2021-06-05 23:19:34,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3610.8ms TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:19:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-06-05 23:19:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 5507. [2021-06-05 23:19:34,529 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 23:19:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 10986 transitions. [2021-06-05 23:19:34,535 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 10986 transitions. Word has length 47 [2021-06-05 23:19:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:34,535 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 10986 transitions. [2021-06-05 23:19:34,535 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 23:19:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 10986 transitions. [2021-06-05 23:19:34,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:34,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:34,539 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:34,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 23:19:34,740 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 130 times [2021-06-05 23:19:34,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:34,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692087061] [2021-06-05 23:19:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:35,109 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 23:19:35,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:35,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692087061] [2021-06-05 23:19:35,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692087061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:35,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990228540] [2021-06-05 23:19:35,109 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 23:19:35,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:19:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:35,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:19:35,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:35,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:36,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:36,037 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 23:19:36,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:36,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:36,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:19:36,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-06-05 23:19:36,053 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 23:19:36,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990228540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:36,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:36,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:36,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855261421] [2021-06-05 23:19:36,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:36,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:36,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:36,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:36,054 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 23:19:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:37,029 INFO L93 Difference]: Finished difference Result 8590 states and 17250 transitions. [2021-06-05 23:19:37,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:19:37,029 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 23:19:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:37,037 INFO L225 Difference]: With dead ends: 8590 [2021-06-05 23:19:37,037 INFO L226 Difference]: Without dead ends: 8567 [2021-06-05 23:19:37,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1062.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-05 23:19:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 5513. [2021-06-05 23:19:37,092 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 23:19:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 10999 transitions. [2021-06-05 23:19:37,099 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 10999 transitions. Word has length 47 [2021-06-05 23:19:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:37,099 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 10999 transitions. [2021-06-05 23:19:37,099 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 23:19:37,099 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 10999 transitions. [2021-06-05 23:19:37,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:37,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:37,103 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:37,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 23:19:37,304 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:37,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 131 times [2021-06-05 23:19:37,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:37,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977843084] [2021-06-05 23:19:37,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:37,664 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 23:19:37,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977843084] [2021-06-05 23:19:37,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977843084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984511351] [2021-06-05 23:19:37,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:37,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:19:37,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:37,700 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:19:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:38,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:38,660 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 23:19:38,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:38,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:38,667 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 23:19:38,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:38,676 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 23:19:38,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984511351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:38,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:38,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:38,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546810433] [2021-06-05 23:19:38,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:38,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:38,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:38,677 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 23:19:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:39,672 INFO L93 Difference]: Finished difference Result 11538 states and 23485 transitions. [2021-06-05 23:19:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:19:39,672 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 23:19:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:39,683 INFO L225 Difference]: With dead ends: 11538 [2021-06-05 23:19:39,683 INFO L226 Difference]: Without dead ends: 11355 [2021-06-05 23:19:39,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1093.2ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:39,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-06-05 23:19:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 5330. [2021-06-05 23:19:39,749 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 23:19:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10656 transitions. [2021-06-05 23:19:39,755 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10656 transitions. Word has length 47 [2021-06-05 23:19:39,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:39,755 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10656 transitions. [2021-06-05 23:19:39,755 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 23:19:39,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10656 transitions. [2021-06-05 23:19:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:39,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:39,759 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:39,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 23:19:39,959 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:39,960 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 132 times [2021-06-05 23:19:39,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:39,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021827761] [2021-06-05 23:19:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:40,263 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 23:19:40,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:40,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021827761] [2021-06-05 23:19:40,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021827761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:40,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510463265] [2021-06-05 23:19:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:40,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:19:40,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:40,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:19:40,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:41,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:41,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:41,176 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 23:19:41,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:41,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:41,184 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 23:19:41,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:41,192 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 23:19:41,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510463265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:41,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:41,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 23:19:41,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788753857] [2021-06-05 23:19:41,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:19:41,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:41,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:19:41,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:19:41,193 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 23:19:42,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:42,118 INFO L93 Difference]: Finished difference Result 6335 states and 12694 transitions. [2021-06-05 23:19:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:19:42,119 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 23:19:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:42,124 INFO L225 Difference]: With dead ends: 6335 [2021-06-05 23:19:42,125 INFO L226 Difference]: Without dead ends: 6300 [2021-06-05 23:19:42,125 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1339.4ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:19:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-06-05 23:19:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4817. [2021-06-05 23:19:42,166 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 23:19:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 9608 transitions. [2021-06-05 23:19:42,171 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 9608 transitions. Word has length 47 [2021-06-05 23:19:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:42,171 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 9608 transitions. [2021-06-05 23:19:42,171 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 23:19:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 9608 transitions. [2021-06-05 23:19:42,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:42,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:42,175 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:42,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:42,375 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 133 times [2021-06-05 23:19:42,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:42,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624445171] [2021-06-05 23:19:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:42,745 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 23:19:42,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624445171] [2021-06-05 23:19:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624445171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788037677] [2021-06-05 23:19:42,746 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 23:19:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:42,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:19:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:43,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:43,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:43,673 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 23:19:43,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:43,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:43,681 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 23:19:43,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:43,689 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 23:19:43,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788037677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:43,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:43,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-06-05 23:19:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878935391] [2021-06-05 23:19:43,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:19:43,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:43,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:19:43,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:43,691 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 23:19:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:44,781 INFO L93 Difference]: Finished difference Result 9532 states and 19425 transitions. [2021-06-05 23:19:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:19:44,781 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 23:19:44,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:44,789 INFO L225 Difference]: With dead ends: 9532 [2021-06-05 23:19:44,789 INFO L226 Difference]: Without dead ends: 9364 [2021-06-05 23:19:44,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1077.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:19:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-06-05 23:19:44,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 4844. [2021-06-05 23:19:44,837 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 23:19:44,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 9654 transitions. [2021-06-05 23:19:44,842 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 9654 transitions. Word has length 47 [2021-06-05 23:19:44,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:44,842 INFO L482 AbstractCegarLoop]: Abstraction has 4844 states and 9654 transitions. [2021-06-05 23:19:44,842 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 23:19:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 9654 transitions. [2021-06-05 23:19:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:44,845 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:44,845 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:45,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 23:19:45,045 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 134 times [2021-06-05 23:19:45,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:45,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297739063] [2021-06-05 23:19:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:45,354 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 23:19:45,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:45,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297739063] [2021-06-05 23:19:45,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297739063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:45,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990065035] [2021-06-05 23:19:45,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:19:45,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:19:45,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:45,382 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-06-05 23:19:45,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:19:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:19:46,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:19:46,253 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 23:19:46,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:19:46,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:19:46,262 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 23:19:46,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-06-05 23:19:46,270 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 23:19:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990065035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:19:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-06-05 23:19:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316056772] [2021-06-05 23:19:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:19:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:19:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:19:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:19:46,271 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 23:19:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:19:47,472 INFO L93 Difference]: Finished difference Result 6513 states and 13009 transitions. [2021-06-05 23:19:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:19:47,472 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 23:19:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:19:47,477 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 23:19:47,477 INFO L226 Difference]: Without dead ends: 6115 [2021-06-05 23:19:47,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1433.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:19:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2021-06-05 23:19:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 4875. [2021-06-05 23:19:47,516 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 23:19:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 9691 transitions. [2021-06-05 23:19:47,521 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 9691 transitions. Word has length 47 [2021-06-05 23:19:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:19:47,521 INFO L482 AbstractCegarLoop]: Abstraction has 4875 states and 9691 transitions. [2021-06-05 23:19:47,521 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 23:19:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 9691 transitions. [2021-06-05 23:19:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:19:47,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:19:47,524 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:19:47,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:19:47,725 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:19:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:19:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 135 times [2021-06-05 23:19:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:19:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536505151] [2021-06-05 23:19:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:19:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:19:48,052 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 23:19:48,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:19:48,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536505151] [2021-06-05 23:19:48,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536505151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:19:48,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20712239] [2021-06-05 23:19:48,052 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 23:19:48,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 23:19:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:19:48,086 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 71 conjunts are in the unsatisfiable core [2021-06-05 23:19:48,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:21:20,808 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-05 23:21:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:21:20,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:21:20,883 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 23:21:20,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:21:20,909 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.1 percent of original size [2021-06-05 23:21:20,911 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 23:21:20,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:181, output treesize:7 [2021-06-05 23:21:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 136 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:21:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20712239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:21:20,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:21:20,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-06-05 23:21:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147300834] [2021-06-05 23:21:20,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:21:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:21:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:21:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1124, Unknown=25, NotChecked=0, Total=1260 [2021-06-05 23:21:20,929 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 23:21:33,131 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-06-05 23:22:25,291 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-06-05 23:23:11,528 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-05 23:23:40,366 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 23:23:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:23:40,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:40,568 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:893) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:807) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:364) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-05 23:23:40,572 INFO L168 Benchmark]: Toolchain (without parser) took 813502.32 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 339.6 MB in the beginning and 577.0 MB in the end (delta: -237.3 MB). Peak memory consumption was 155.3 MB. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 340.8 MB in the beginning and 340.7 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.61 ms. Allocated memory is still 360.7 MB. Free memory was 339.6 MB in the beginning and 338.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L168 Benchmark]: Boogie Preprocessor took 16.75 ms. Allocated memory is still 360.7 MB. Free memory was 338.1 MB in the beginning and 337.2 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L168 Benchmark]: RCFGBuilder took 301.94 ms. Allocated memory is still 360.7 MB. Free memory was 337.1 MB in the beginning and 325.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L168 Benchmark]: TraceAbstraction took 813151.84 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 324.7 MB in the beginning and 577.0 MB in the end (delta: -252.3 MB). Peak memory consumption was 140.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:23:40,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 340.8 MB in the beginning and 340.7 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.61 ms. Allocated memory is still 360.7 MB. Free memory was 339.6 MB in the beginning and 338.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.75 ms. Allocated memory is still 360.7 MB. Free memory was 338.1 MB in the beginning and 337.2 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 301.94 ms. Allocated memory is still 360.7 MB. Free memory was 337.1 MB in the beginning and 325.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 813151.84 ms. Allocated memory was 360.7 MB in the beginning and 752.9 MB in the end (delta: 392.2 MB). Free memory was 324.7 MB in the beginning and 577.0 MB in the end (delta: -252.3 MB). Peak memory consumption was 140.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...